1 / 12

Meiosis

Meiosis. 2 divisions of the nucleus. DNA is replicated forming homologous chromosomes. Prophase 1. Chromosomes condense Nuclear envelope disappears Crossing over occurs between Homologous chromosomes. Metaphase 1. Pairs of homologous chromosomes move to the equator. Anaphase 1.

gcarbajal
Télécharger la présentation

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. Meiosis 2 divisions of the nucleus

  2. DNA is replicated forming homologous chromosomes

  3. Prophase 1 • Chromosomes condense • Nuclear envelope disappears • Crossing over occurs between Homologous chromosomes.

  4. Metaphase 1 • Pairs of homologous chromosomes move to the equator

  5. Anaphase 1 • Homologous chromosomes move to opposite poles

  6. Telophase 1 • Chromosomes gather at the poles • Cytokinesis

  7. Prophase 2 • New spindle forms around chromosomes

  8. Metaphase 2 • Chromosomes line up at equator

  9. Anaphase 2 • Centromere divides • Chromatids (now chromosomes) move to opposite poles

  10. Telophase 2 • Nuclear envelope forms around each set of chromosomes • Cytokinesis • Results in 4 haploid cells (gametes)

  11. Genetic Variation • Variation generated quickly

  12. Crossing over • DNA exchange between homologous chromosomes

More Related