Essays on Mitosis

Abstract

Research shows that the invertebrates can undergo both asexual and sexual reproduction, for example, the case with the female copperhead snake. Various studies took place to explore the instances that commonly occur in snakes and lizards, whereby the organisms reproduce through the process of parthenogenesis. The essay will entail an analysis of the processes of asexual and sexual reproduction, about the genetic diversity. In particular, a strong relationship exists between the processes of cell division with the common genetic diversity that exists among organisms. Additionally, there will be an analysis of the processes of cell division, and most specifically ...

There are six stages in the life cycle of a mitotic cell which include interphase and cytokinesis. The mitosis stage is divided into four other sub stages. Mr. Interphase performs various functions such as the cellular respiration, photosynthesis and protein synthesis in preparation to undergo the Mitosis stage. Mr. Mitosis has four witnesses, Prophase who helped nuclear membrane disappear into the genetic material. The other witness, Metaphase, makes the alignment of the chromosomes. Anaphase helps in centralizing the chromosomes and changing them from being x-shaped (Rieder, 17). The last witness created the new component of nuclei with their new ...

Question 1

Angiosperms can be dioecious or monoecious and they go through sexual production (Raghavan, 1999). Angiosperm flowers are considered to be hermaphroditic or androgynous because the same flower contains both female and male gametophytes. However, angiosperm flowers with only female gametophytes are incomplete and considered to be either a carpellate flower containing only female parts or a staminate flower containing only male structures. The male reproductive structure of the angiosperms is known as andoecium. The anthers that are found in the stamens of the angiosperms contain pollen sacks, which have the microsporocytes. The cells go through a process known as ...

Final Test

Explain in general terms the process of DNA replication. The replication of the DNA starts when the double helix unwinds. Each of the two strands serves as the template using which the new DNA double helix strands are formed. The different bases on each of the two strands are then matched in order to form a new set of two strands. Each of the new strands partners with the parent strand to form a double helix (Roth 26).

Prophase – Chromatids are joined at the centromere. Spindle formation occurs. The separation of centrioles occurs in animal cells (Tobin and Jennie ...

1. Explain in general terms the process of DNA replication. DNA replication refers to the process whereby DNA makes its own copy during the process of cell division. During this process, the DNA strands unzip themselves since helicase enzyme breaks the hydrogen bonds between the complementary strands. As this occurs, a replication fork is created. Each individual strand (leading and lagging) will be used as templates. A primer attaches itself to the leading strand and the synthesis of DNA begins, whereby DNA polymerase adds nucleotides to the synthesized strand. This is a continuous process and occurs in 5’ to ...

A General Outlook on Meiosis and Mitosis Processes

Compare and contrast mitosis and meiosis. Think phases, starting and ending products, chromosome numbers, the purpose of each, and the cell types that complete each type of division. Be sure to do a DIRECT compare and contrast, and write in paragraph form - Mitosis involves one cellular division resulting in identical daughter cells while meiosis involves two cellular divisions resulting in different daughter cells. Meiosis produces four haploid cells while mitosis produces two diploid cells- this ensures genetic diversity by sexual reproduction in meiosis and cellular reproduction and production of general growth products in mitosis. The chromosome number also ...

Q1. Explain the regulation of the cell cycle

Every cell is regulated by particular checkpoints to ensure that the daughter cells are exact duplications. This is to help guarantee that cell mutations are not passed on to the next generation of cells. In eukaryotic cells, there are three main checkpoints. These are points at which cell replication can be halted until certain conditions are met (Boundless, 2016). The first checkpoint is near the end of the G1 phase. It is here that DNA gets evaluated and checked for damage. If damage has occurred, it either gets corrected or gets prevented from moving on to the next phase ( ...

Abstract

This examination paper acknowledges the spectacular diversity of reproductive adaptations for survival of various categories of land plants. It describes a typical life cycle of a land plant that reproduces via spores. It also identifies the different parts of Plant organs and their functions such as cell organelles, parts of a land plant, and epidermal cells. A microscope is an important tool for examination of biological specimens, including cell’s internal structures called organelle and is important in magnifying the focused area. Plants are classified into four main groups, namely, ferns, mosses, flowering and confers. This paper finds that ...

The aspect of growth is in all living organisms is brought about by splitting of cells. The mitotic division of cell involves separating of chromosomes into two identical sets and hence the daughter cells are genetically identical to the parent cell. During meiotic cell division, the cell undergoes various stages characterized by the distinct cellular reorganization (Huskins, 8). The stages undergone by a cell during mitosis start with interface which is characterized by active metabolic activity before mitosis. Prophase is the second phase of mitotic cell division. It is a distinct phase. The chromatin condenses and becomes visible under ...

Chapter 9

Question 1

Binary mission in prokaryotes Mitosis and Meiosis in eukaryotes Question 2 The development of embryos as well as the growth and development of bodies. Important in asexual reproduction. Question 3 The term cell cycle refers to an ordered set of events leading to cell growth and division into two daughter cells.

Question 4

Interphase is a phase of the cell cycle characterized by the absence of cell division. During this phase, the cell obtain nutrients, the organelles duplicates, protein synthesis takes place, and cells duplicate its genetic material (its chromatids). The genetic material is located in the nuclei of ...

Question 1

In mitosis, the number of chromosomes before and after cell division do not change. Mitosis results in daughter cells are having a diploid number of chromosomes as the parent cells.

Question 2

Mitosis is divided into four phases: Prophase- in this phase, the chromosomal material (chromatin) condenses forming compact chromosomes which are seen as two chromatids joined together at the centromere. The mitotic spindle also starts to assemble with the help microtubules Metaphase- In this phase, the spindle fibres become attached to the kinetochores of chromosomes. Chromosomes move to the equator and are aligned along the metaphase plate via spindle fibres ...

(6 points) Compare and contrast mitosis and meiosis (include at least 3 comparisons and 3 differences).

Both mitosis and meiosis are usually associated the cytokinesis In both processes, end result is usually production of daughter cells from the parent cell The fundamentals in both processes are the same in that there is breakdown of nuclear membrane, genetic material separation into two groups, cell division and eventually the nuclear membrane in the cells reform

Differences

In meiosis, there are two rounds involved in genetic separation while in mitosis there is only one round. In meiosis, there is separation of homologous chromosomes ...

1. What is genetics? Genetics is a division or biology that deals with the study of heredity and the rules governing it (TheMedicalDictionary.com). 2. Do inherited traits only include physical traits that we can see? If not, what are some other types of inherited traits? Inherited traits include more than just physical traits. Other non physical traits that are inherited as such as behavioral traits, intelligence, tongue rolling, handedness, hand clasping PTC tasting and other observable human characteristics (Stark et al ). 3. What is bioethics?

4. Explain how the DNA molecule carries information. Genetic information in DNA is encoded ...

1) Proto-Oncogenes and Tumor Suppressor Genes are two types of genes that ordinarily keep the cell cycle functioning as it should. Explain the roles of these two types of genes, and explain what can occur when these types of gene are not working properly. Provide at least two different examples of cancers associated with mutations of these types of genes.

The purpose of the proto-oncogenes under normal circumstances is to make sure that cells proliferate, in other words the oncogenes stimulate cell production. But when a normal, healthy ocogene cell becomes mutated or expresses at higher than normal levels it causes cancer. The first oncogenic virus was discovered in 1916 and called the Rous virus after the person who discovered it, Peyton Rous. Rous viruses represent a family of viruses called the retro viruses. Retro viruses contain a genetic material called ribonucleic acid (RNA).

There is always the possibility that RNA will be transcribed into DNA (deoxyribonucleic acid) by an enzyme of ...

Meiosis refers to the form of cellular reproduction where the division of cells results into the chromosome number being reduced by half and results in haploid cells. Mitosis, on the other hand, is the process through which cells divide producing daughter cells, which are diploid, and a replica of the parent cell (Department of Genetics, 2004).

Meiosis usually takes place in the sexual reproduction processes while mitosis takes place in asexual and cellular reproduction as well as in the general growth and body repair. Meiosis usually takes place in humans, plants, animals, and fungi and mitosis take place in all ...

Reproduction

Introduction The objective of this paper is to understand the process of gametogenesis and how diploid germ cells on the testes and ovaries become the haploid gametes. The paper is divided into three sections. The first section discusses the process of gametogenesis. The second section deliberates how diploid germ cells on the testes and ovaries become the haploid gametes. The third section concludes the paper.

Process of Gametogenesis

Gametogenesis is a biological process in which the formation of sex cells or gametes carried out in the gonads i.e. spermatogenesis (formation of sperms) in male’s testes and oogenesis (formation of ova) in ...

Biology of Disease

Mode of action of;- Dexamethasone The Glucocorticoid receptors are discovered intracellularly in all tissues. They enter cells through inactive dispersion and structure a complex with a receptor protein (Rhodes & Hartnoll, 2002, P.10). This intricate then experiences an irreversible enactment and enters the cell core, where it ties to the DNA, hence prompting organic impacts instigated by these hormones, which include expanded hepatic gluconeogenesis, as well as expanded lipolysis (Ahmed, 2007, P.13). Dexamethasone is utilized to treat numerous provocative and immune system conditions, for example, rheumatoid joint pain and bronchospasm. Idiopathic thrombocytopenic purpura, an abatement in quantities of ...

- The stromal cells that are found in the developing gonads of tetrapods begin from the medulla from the peritoneal wall and the cortex from inter-renal blastema or mesonephric. Hence the gonads have a dual origin. - Spermatogenesis occurs in a syncytial complex because it involves the formation of sperm from undifferentiated cells that are first attached to rachis. Syncytial cell complex or syncytium result when cells with single nuclei fuse to for a cell with nucleus. Syncytial cell complex is vital in oogenesis in that it assists in the differentiation of cells. One other developmental model is vitellogenesis. - ...

Lab 1: Ethical Issue in the Movie Gattaca. The epicentre of ethical issues in the movie Gattaca is the manner in which an individual ought to be judged. Should it be by the genetic composition one is born with or by the character traits, personality attributes and ambitions chosen by an individual? Vincent is born with genetic weaknesses that could result in ailments in the future. His genetic composition denies him access to his dream job despite the fact that he achieves the required grades in school and is a strong and athletic young man. As a result, Vincent designs a plan to ...

Eukaryotes are organisms that made up of cells that have a have a nucleus that is bound by a membrane. They also have membrane bound organelles. Prokaryotes are organisms whose cells do not have a nucleus or any membrane-encased organelles.

Similarities

Both prokaryotes and eukaryotes have DNA as their genetic composition or material. Secondly, both cells are membrane bound. They both have ribosomes. They have nearly the same basic metabolism. Both cells have vacuoles. Lastly, the two cells both have vesicles.

Differences

Eukaryote cells have a nucleus while the prokaryote cells lack a nucleus. Eukaryotes have a true membrane binding the nucleus in the cell, while the prokaryote ...

The Process of Spermatogenesis in the Male Testis

Spermatogenesis is an intricate process that involves mitotic cell division, meiosis, and its process. The regulation of spermatogenesis involves the endocrine and the paracrine mechanisms. The spermatogenesis endocrine stimulation involves the follicle stimulating hormones (FSH) and the luteinizing hormone. The luteinizing hormone acts through the intermediary testosterone that is produced by the leydig cells in the testis. A male fertility requires the production by the testis with large number of normal spermatozoa by spermatogenesis process. There are three major steps subdivided in the process; the mitosis, meiosis, and the transformation of the round spermatid. The multiplication of spermatogonia is ...

Virtual Lab Report

Virtual Lab 1: Virtual Microscopy A. Gauge the size of various biological components and organisms. The Virtual Microscope (copy and paste this address into a new browser window: http://learn.genetics.utah.edu/content/cells/scale/ ) can be used to make these observations. Estimate the size (length and width in microns) of An E.Coli cell is around 0.5µm in width and around 2µm in length. A mitochondrion is around 0.5µm in width and approximately 10µm in length. A Red blood cell is around 5.5µm in width and 7.5µm in length. A virus is approximately 0.25µm in width and ...

- While conducting research, scientists need to understand the main variables within their experiments. Define and provide an example of both an independent and dependent variable. In any research there are mainly two variables; the independent and the dependent variables. Any scientist needs to understand the variables very well because of the following reasons. First the variable determines the type of methodology that can be used in the study. What this means is that the type or variables would determine how the whole research is carried out. For example, a variable might have qualitative or quantitative aspects that would ...

Evolution of Sexual Reproduction

There are different forms of reproduction, which includes vegetative, asexual, sexual reproductions. Naturally, the question arises, what are the benefits of sexual reproduction in terms of fitness of a species, and how does it compare to other forms of reproduction? Logically, females reproducing asexually are more likely to have twice as many grandchildren and can increase their fitness two folds(Hurst and Peck). On the other hand, by reproducing sexually, both sexes have to invest copious amounts of time in selecting mates, making nests, bringing up offspring etc. In this paper we will try to understand the benefits and disadvantages ...

Introduction/background

Saccharomyces cerevisiae is an organism that can exist either as a singled-cell organism or as pseudomycelia. It is used in many scientific studies. It is commonly known as baker’s yeast. Saccharomyces cerevisiae is widely employed in scientific studies mainly due to the following reasons: it has a sequenced genome, it is easy to maintain in the lab, researchers can easily manipulate its genetics, and it grows rapidly. Saccharomyces cerevisiae can live with two genomes (diploid, n=32) or one genome (haploid, n=16). Consequently, the organism can undergo meiotic differentiation. In diploid phase, cells of the saccharomyces cerevisiae are more resistant to ...

“Unless and until it can be proven that the unborn child is not a living entity, then its right to life, liberty, and the pursuit of happiness must be protected.” (" Reagan, “Evil Empire,” Speech Text"). Abortion, a word derived from the Latin abortus meaning to be aborted or to miscarry, refers to the premature end or termination of a pregnancy ("Latin Definition for: aborior, aboriri, abortus (ID: 171)"). Generally, a majority of women get an abortion performed before they are twelve-week pregnant, i.e. during the first-trimester. However, some women may also get an abortion performed up to twenty-four weeks in the second trimester ...

Cancer is the abnormal proliferation and differentiation of cells in an abnormal tissue incongruent with the growth pattern of normal cells that persists even after the stimuli that evoked the change is withdrawn. The cell cycle check points at G1, G2 and at the end of metaphase that prevent transmission of genetically damaged DNA fail to occur. Transmission of faulty DNA results in either an abnormal rate of cell division and multiplication or abnormally constituted daughter cells. The genes affected are the normal regulatory genes including growth promoting proto-oncogenes-normal genes that are prone to becoming cancerous on mutation ...

Cell Cycle

Introduction Asymmetric cell division is a situation where a cell divides into parts of two cells that comprise two dissimilar cellular fates. For most part, the term applies and is usually used in referring to cells that are essentially diverse at the point of cytokinesis. Cytokinesis is the term used to describe how the cytoplasm and its organelles divide to form two separate cells. The daughter cell formed contains the same genetic material as the mother cell. This implies that individual daughter cell comprise a diverse physical makeup. This stands to convey the contrast surrounding extrinsically dissimilar cells where individual cell ...

The cell is the basic unit of all the living organisms. It contains many important structures like chromosomes, which are responsible for the genetic makeup of an organism (Wasserman 111). The cells of an organism undergo a process known as cell division. In this process, a parent cell splits into two or more daughter cells (Wasserman 111). There are two types of cell division namely meiosis and mitosis. It is pertinent to note that, difference is that in mitosis the number of the daughter cells are two whereas, meiosis creates four daughter cells (Wasserman 120). Another thing that differentiates the ...

Mitosis is an essential process in the cell cycle for the growth and development of an organism. Over the years, numerous studies have been conducted to understand the dynamics of mitosis and literatures about the process are fast accumulating. However the mechanism that is important in the vicissitudes of cellular shape during mitosis has remained unknown. Until later, a groundbreaking research on a “small ubiquitin-related modifier” (SUMO) will unravel the mystery that takes place when the cell changes its shape during mitosis. It is a general knowledge that during the early stage of mitosis, the cell takes a round shape at the ...

Comparison and Contrast of mitosis and meiosis

One of the most essential processes that occur in living cells is cell division. This is the process in which a primary cells producer new cells by dividing into two or more parts. Cell division in living organisms usually occurs in two different ways: meiosis and mitosis. In the 9th edition of Biology: Life on Earth by Gerald Audesirk, Theresa Audesirk and Bruce E. Byers, meiosis is defined as a kind of cell division where a diploid nucleus essentially divides twice to give rise to four haploid nuclei. Each of the four haploid nuclei contains half of the number of chromosomes ...

Aerobic Cell Respiration

Aerobic Cell Respiration is necessary for the respiration characteristics of life. Every living organism requires energy to use for growth and maintenance. Aerobic Cell Respiration leads to the conversion of biochemical energy into the Adenosine Tryphosphate (ADP). This occurs during catabolic metabolic reactions in which volumes of energy are released as a result of the breakdown of large molecules into small ones (Rich, P. R., 2003). This is an exothermic redox reaction which and it is through it that the living organisms manufacture energy. However, it can only occur if the body is supplied with energy rich foods such as ...

Filmography

The American Science fiction film entitled Evolution starring David Chucovny, Orlando Jones, Sean William Scott and Julianne Moore was released in 2001, in which the story started when a meteor fell on earth carrying alien organisms that evolved into more complex organisms threatening to take over the earth.

Relevance to the Field of Biology

The film features several significant facts about biology and particularly in evolution. In the film, the origin of life came from one-celled organisms carried by the meteor that felon the Arizona flatlands. The organism have shown remarkable rate of evolutionary change that only happens within hours. The single-celled organism undergoes the process ...

Abstract

This essay aims to explore several scientific issues: the relation between the burning of fossil fuels and its consequential unbalance of the carbon cycle and the increase of the greenhouse effect that follows it, causing a biosphere change with multiple deleterious effects, both on environments, species and life itself; understand how Darwin’s theory of Natural Selection explains the existence of different species of a being (such as lizards) in one same island; why, now in the Genetics area, a cell’s DNA is only visible during mitosis for being condensed, why “daughter cells”, in meiosis, all have unique genetic material, caused ...

Question 1

Mitosis and meiosis are the essential processes that enhance growth of both plants and animals. The two processes serve various purposes as outline in this essay. Mitosis enhances multiplication of cells, in multcellular organism, from a single cell fused from egg and a sperm to numerous cells. Mitosis is also important in the growth of single-cell organisms, but in this case, the process helps in production since making of a new cell in a single-cell organisms mean new organism. On the other hand, serves a primary function of creating reproduction cells in the ovaries and testes. The different between miotosis and meiosis is ...

- Describe the phases of meiosis II Meiosis II has 4 phases, prophase, metaphase, anaphase, and telophase. At the end of meiosis I, microtubules move each member of the centriole pair to an opposite spindle pole in both daughter cells. During prophase II, the microtubules attach to the chromosomes causing them to recoil and shorten. During metaphase II, the microtubules, duplicated chromosomes, and motor proteins, interact in a manner that positions all the duplicated chromosomes halfway between the 2 spindle poles. During anaphase II, the connection between the 2 sister chromatids of every chromosome breaks and each of the ...

(DNA Quantification)Mitosis and Meiosis) (Genetics) 1. At 360nm, the DNA strongly absorbs light and the value generated allows easier estimation of solution concentration. 2. Contamination of RNA can easily result in an overestimation of DNA concentration due to high occurrence of RNA secondary structures. 3. The cell wall of plant cells are surrounded by a cell membrane. In this cell the DNA is located in the nucleolus and enclosed by a phospholipids membrane. In plants, the phospholipids tend to exist in the diacyl form. 4. The variations in DNA are affected by the number chromosomes in ...

Cancer and Mitotic Rate

There are basically four types of tissues in the body namely; connective tissues, epithelium, nervous tissue and muscle. Admittedly, these types of tissues have differing mitotic rates perhaps due to the type of the role they perform in the body. Even though the type of tissue that has the lowest rates cannot be accurately pinpointed, it is openly believed that epithelial tissues have the highest mitotic rates. Quite notably, neuron and muscle cells do not always undergo mitosis. Epithelial tissues are the tissues made up of cells that form the external surfaces that cover the body. The tissues, ...

How an Animal Cell Survives

Although the animal cell is similar in many ways to eukaryotic as well as some few eukaryotic cells, there are strikingly large differences between them, especially the requirements for survival in various environments (Baitsell, 2008). The animal cell is one of the members of eukaryotic cell category, whose structure is quite complicated by the organelles present as well as the diverse functions they play towards the survival of the cell and the organism in general (Solomon, Berg, & Martin, 2004). The cell structure is defined by a plasma membrane that bounds a number of organelles, all of which function towards the ...

Meiosis and mitosis

Gene transfer occurs during cell division from mother cells to daughter cells. The DNA carries the genetic information transfer which it from one cell to another during cell division. Genes are located on the DNA strand that is contained in a chromosome. Mitosis and meiosis are the two types of cell division that occur during reproduction in various organisms. Mitosis involves the nucleus dividing into two identical daughter cells. Mitosis goes in hand with cytokinesis, which result in two separate daughter cells at the end of division. The process of mitosis takes place in four phases namely the prophase, metaphase, ...