1 / 45

Eduard Strasburger

Meiosis & Mitosis. Walther Flemming. Eduard Strasburger. I. Animation 3.2. Animation 3.3. II. Genes exist, come in pairs. Gametes – only 1 gene copy. pair of copies SEGREGATE. Each gamete – only 1 gene copy. alleles combine randomly In offspring. Animation 5.1a.

celerina
Download Presentation

Eduard Strasburger

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 & Mitosis Walther Flemming Eduard Strasburger

  2. I.

  3. Animation 3.2

  4. Animation 3.3

  5. II.

  6. Genes exist, come in pairs Gametes – only 1 gene copy pair of copies SEGREGATE Each gamete – only 1 gene copy alleles combine randomly In offspring

  7. Animation 5.1a Start day 2, back to 5 pts.

  8. Mendel’s 2nd Law: Genes segregate independently אין תלות בין גנים בסגרגציה (הפרדה)

  9. Parental Recombinant Parental Recombinant Parental

  10. Mendel’s rules are relevant for organisms that sexually reproduce: diploid/haploid • Plants, Animals, many Monera… Those that ‘do’ meiosis

  11. III-IV Sex chromosomes: The breakthrough to the chromosomal theory of inheritance

  12. Nettie Stevens Thomas H. Morgan

  13. Thomas H. Morgan

  14. Reciprocal White Red Mothers Fathers Red White Daughters Sons Board

  15. 習字書道

  16. המופיליה

  17. אחיות כנשאיות – לא חולות

  18. To be a male: Fly: ratio of X chromosomes to autosomes = 1 Man: Presence of Y chromosome

  19. Barr body For ‘dosage compensation’, 1 X chromosome is condensed, silenced in females

  20. Y linked trait?? Y?

  21. First Second (reciprocal)

  22. Mammals Fruitflies Moths Homogametic Heterogametic Heterogametic Homogametic

More Related