Download presentation

Presentation is loading. Please wait.

Published byAngel Galloway Modified over 4 years ago

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 BbHh bbHh Bbhh bbhh BbHh bbHh Bbhh bbhh

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

Similar presentations

Presentation is loading. Please wait....

OK

Lecture #28 Punnett Squares Honors Biology Ms. Gaynor.

Lecture #28 Punnett Squares Honors Biology Ms. Gaynor.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google