1 / 32

Genetics: Punnett Squares and Complex Inheritance

Understand genetics through Punnett squares, heterozygous crosses, dominant traits, and complex inheritance like incomplete dominance and codominance. Explore genotypes and phenotypes.

mitchelle
Download Presentation

Genetics: Punnett Squares and Complex Inheritance

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. Review: 2 heterozygous dominant plants are crossed. Complete the punnett square: • Green is dominant, white is recessive

  2. 2 heterozygous dominant plants are crossed. G g G g

  3. 2 heterozygous dominant plants are crossed. Complete the % and genotype & phenotypes. Green is dominant, white is recessive • 1. What percent would be homozygous green? • 2. What percent would be heterozygous green? • 3. What percent would be white? G g GG Gg G g Gg gg

  4. Add to table of contents: • MORE PUNNETT SQUARES pg 48 • COMPLEX INHERITANCE pg 49

  5. Complex Inheritance pg 49 • -Incomplete dominance -a condition in which the trait is neither dominant nor recessive, so genes blend together. red (CRCR) flower X white (CWCW) flower = all pink (CRCW) flowers. OR Red(RR) flower X white (WW) flower = all pink(RW) flowers

  6. Know your colors?

  7. Draw the punnett square and fill in. CR CR CW CRCW CRCW CW CRCW CRCW

  8. Codominance-a condition where both genes are equally dominant, so both genes show up. • Black chicken(BB) X a white(WW) = checkered chicken(BW).

  9. Draw the punnett square and fill in. B B BW BW W W BW BW

  10. Incomplete or Co- dominance?

  11. Incomplete or Co- dominance?

  12. Incomplete or Co- dominance?

  13. Incomplete or Co- dominance?

  14. Incomplete or Co- dominance?

  15. Incomplete or Co- dominance?

  16. Incomplete or Co- dominance?

  17. Heterochromia – amount of melanin in the eyes

  18. Do the following sample complex inheritance punnett squares on pg. 48:

  19. A homozygous white bull is crossed with a homozygous brown cow. B=brown W=white Codominance What are the genotypes and phenotypes of the offspring?

  20. A homozygous white bull is crossed with a homozygous brown cow. B=brown W=white Codominance W W B B What are the genotypes and phenotypes of the offspring?

  21. A dark purple flower is crossed with a white flower. The traits are incompletely dominant. P=dark purple W=white What are the genotypes and phenotypes of the offspring?

  22. A dark purple flower is crossed with a white flower. The traits are incompletely dominant. P=dark purple W=white P P W W What are the genotypes and phenotypes of the offspring?

  23. Answer Essential Question

More Related