Chapter Twelve Meiosis

Asexual Reproduction-A single individual gives rise to that are identical to themselves.

Sexual Reproduction-Sexual Reproduction is when individuals combine their DNA to produce a seperate organism. Two haploid sex cells (half the genetic material of a somatic/body cell) combine to form a zygote.

One advantage of sexual reproduction is increased variation among a species, and this diversity allows species to survive in all sorts of different enviorments and circumstances. The DNA variation in gametes leads to different alleles being exoressed in their genes. For example, you have a gene for eye color, and when a certain allele is expressed, it determines what color your eyes are. (Eye color gene, blue allele)

While asexual reproduction only requires diploid cells to undergo mitosis, sexual reproduction requires haploid cells. Haploid cells have half the DNA of a regular somatic/diploid and are produced by the process of meiosis, where a cell goes through the steps of mitosis. At first, DNA replicates, so the first mitosis creates diploid cells. However, these cells are put through mitosis again, so they have only half the genetic material of a somatic cell. These specialized sex cells that result from meiosis are known as gametes (sperm, produced in the testes for men, and eggs, produced in the ovaries for females).

The Eight Stages of Meiosis
The Meiosis Wheel

Made with Adobe Slate

Make your words and images move.

Get Slate

Report Abuse

If you feel that this video content violates the Adobe Terms of Use, you may report this content by filling out this quick form.

To report a Copyright Violation, please follow Section 17 in the Terms of Use.