1 / 7

Dihybrid Cross Notes

Dihybrid Cross Notes. 1. Determine dominant and recessive traits. Carefully read the problem. 2. Assign letters for the trait. B = black b = white H = Hairy h = no hair. 3. Determine genotype for parents . *Parents must have 4 alleles Heterozygous, black, hairless male = Bbhh

katy
Download Presentation

Dihybrid Cross Notes

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. Dihybrid Cross Notes

  2. 1. Determine dominant and recessive traits Carefully read the problem

  3. 2. Assign letters for the trait B = black b = white H = Hairy h = no hair

  4. 3. Determine genotype for parents *Parents must have 4 alleles Heterozygous, black, hairless male = Bbhh White heterozygous hairy female = bbHh

  5. 4. Draw the punnett square with 16 boxes

  6. 5. Put parent gamete combinations on box Bbhh gametes: Bh, Bh, bh, bh bbHh gametes: bH, bh, bH, bh Bh Bh bh bh bH bh bH bh

  7. Extra tips • When determining the probability of events • If the problem states “and” then multiply the chances for each • Chance of heads and heads = ½ x ½ = ¼ or 25% • If the problem states “or” then add the chances for each • Chance of heads or tails = ½ + ½ = 1 or 100% As you work the problems write in your own extra tips

More Related