1 / 10

Beyond Mendel’s Laws…

Beyond Mendel’s Laws…. Looking at more complex types of inheritance where more than two phenotypes are possible!. 1. Incomplete Dominance. When red + white = pink!. Red Parent. White Parent. F R F R. F R F R. F W F W. F W F W. ∴ 3 phenotypes using only two alleles!. F R F W. F R F W.

laurie
Download Presentation

Beyond Mendel’s Laws…

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. Beyond Mendel’s Laws… Looking at more complex types of inheritance where more than two phenotypes are possible!

  2. 1. Incomplete Dominance When red + white = pink!

  3. Red Parent White Parent FRFR FRFR FWFW FWFW ∴ 3 phenotypes using only two alleles! FRFW FRFW FRFW FRFW Pink Offspring!

  4. 2. Co-dominance When black + white = black & white!

  5. Chickens and Co-Dominance • Erminette chickens displayboth black and white “checkered” feathers • FBFB = black feathers • FBFW = black and white feathers (NOT grey!) • FWFW = white feathers • 3 phenotypes using only two alleles!

  6. Impatiens and Co-Dominance • Impatiens can show co-dominance intheir colours • This one is COCW(orange and white) • COCO is orange • CWCW is white

  7. 3. Multiple Alleles More than 2 alleles… more than 2 phenotypes!

  8. 4. Polygenic Inheritance Multiple gene locations control a single trait, generating multiple phenotypes…

  9. Assignment: Read and take notes from p. 142-145 and p. 178-180 in your textbook. Complete questions #5, 6, 7, 9, & 12 on p. 146.

More Related