Essays on Metaphase

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 ( ...

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Introduction

Genome imprinting is the latest technique that has genetically modified the face of infertility; it is an epigenetic phenomenon through which the parental origin of a gene is determined based on its expression. 1 There are a vast number of genes in mammals that are marked with their parental origin, and the result of this phenomenon is a single parental allele. These marked genes are known as “imprinted.” They rely on the epigenetic machinery determining their parental identity and maintaining their origin-specific gene expression. There are 100 imprinted genes estimated in human and 200 ...

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 ...

Executive Summary

The objective was to compare effects of GnRH antagonist and standard long protocol agonist on number, and the quality of Metaphase II oocytes, and on reducing risk of hyperstimulation, in patients who are affected by Polycystic ovarian syndrome. Polycystic ovarian syndrome is a common endocrinopathy of the women who are in reproductive age, which is a first cause of the anovulation. GnRH agonists are used in the IVF to avoid premature LH surge before the retrieval of oocyte. Research findings from this study can be significant to various Centers for Reproductive Medicine, and also to all the institutions that practice ART. ...

- 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 ...

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 ...

AIDS, Early pregnancy and Artificial conception are just some of the main issues commonly interrelated with fertility or reproduction, both of which are sensitive topics, that ironically must be given more attention academically. This paper is divided in two parts. The first part tackles In-Vitro Fertilization and other kinds of artificial conception, and the correlation of AIDS, early pregnancy and prostitution, while the latter part focuses the socio-economic and health impacts of AIDS and prostitution with more emphasis on developing countries.

Emergence of Artificial Conception

Artificial insemination and In-Vitro Fertilization are just two ways of replicating pregnancy through the normal process of ...

- 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 ...

Introduction

Genetic evolution refers to change(s) in inheritable traits occurring across succeeding generation of organisms. The change (evolution) is responsible for the diversity at all levels including the molecular level e.g. genetic variations, individual organisms in the same species (intra-species variations) and among species (interspecies variations). It is believed that all organisms emanated from common ancestry about 3.7 billion years ago and then evolved over time to the present biodiversity. Therefore all organisms have some shared traits at the morphological and molecular level with the species sharing a more recent ancestry having more similar traits. The process of evolution involves ...