1 / 5

Mistakes in Meiosis

Mistakes in Meiosis. Nondisjunction. The failure of homologous chromosomes to separate properly during meiosis. Nondisjuction. Trisomy – extra chromosome (has 47) Ex: Down syndrome is Trisomy 21 Monosomy – missing a chromosme Usually does not survive (has 45). Triploid.

lee-winters
Download Presentation

Mistakes in Meiosis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mistakes in Meiosis

  2. Nondisjunction • The failure of homologous chromosomes to separate properly during meiosis.

  3. Nondisjuction • Trisomy – extra chromosome (has 47) • Ex: Down syndrome is Trisomy 21 • Monosomy – missing a chromosme • Usually does not survive (has 45)

  4. Triploid • Has 3 sets of chromosomes • One gamete has 2 copies (diploid) and is fertilized by a gamete with the normal one copy (haploid)

  5. Tetraploid • Has 4 sets of chromosomes • Both gametes have 2 copies (diploid) of each chromosome • Usually causes death in animals • Causes larger and healthier flowers and plants

More Related