11 homologous chromosomes in sperm

Duration: 15min 20sec Views: 1631 Submitted: 20.01.2020
Category: Fisting
This page has been archived and is no longer updated. Organisms that reproduce sexually are thought to have an advantage over organisms that reproduce asexually, because novel combinations of genes are possible in each generation. Furthermore, with few exceptions, each individual in a population of sexually reproducing organisms has a distinct genetic composition. We have meiosis to thank for this variety.

Chromosomes

Biology Exam #4 Hints

Diploid cells of the fruit fly Drosophila have 10 chromosomes. How many chromosomes does a Drosophila gamete have? Which of the following does not take place during the G1 or G2 phases of the cell cycle? The cells of the intestinal epithelium are continually dividing, replacing dead cells lost from the surface of the intestinal lining.

Meiosis, Genetic Recombination, and Sexual Reproduction

A research collaboration based in Kumamoto University Japan has clarified how homologous chromosome pairing -- a process necessary for sperm and egg formation where paternally- and maternally-derived chromosomes match and exchange genetic information during meiosis -- attracts factors that play a monitoring role. Since details on the genetic information exchange mechanism during meiosis have not yet been clarified, this research may lead to future advances in reproductive medicine, such as the identification of the causes of infertility. Meiosis is a special type of cell division that takes place in the ovaries and testes to produce eggs and sperm. Here, maternal and paternal chromosomes of the same type are aligned in a process called "homologous chromosome pairing.
Answers to most of the questions can be found in Meiosis vs. Part I. Multiple Choice Questions 1 - Illustration showing a hypothetical mechanism for the poison oak scenario: a delayed action, cell-mediated immune response.