Questions 1 each parent produces eight different

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Questions 1. Each parent produces eight different types of gametes, which can combine in 64 different ways. Complete the following table: 0.02 0.09 0.23 0.31 0.09 2. How many of these 64 possible offspring have skin that is darker than their 0.02 Skin color # of dark alleles # of times that sequence appears in punnett square Probability (%) 3 shades darker 6 1 1.56 2 shades darker 5 6 9.38 1 shade darker 4 15 23.44 Same as parents 3 20 31.25 1 shade lighter 2 15 23.44 2 shades lighter 1 6 9.38 3 shades lighter 0 1 1.56
3. Each of these three genes has two alleles. Are the dark skin alleles dominant to the light skin alleles? What is the evidence? They have incomplete dominance based n the children’s phenotypes © Modeling Instruction - AMTA Unit 7 - Heredity 2
Name________________________________________ Date_______ Unit 7: Polygenic Inheritance Exercise 9 4. There are more than 7 shades of skin color. Offer an explanation. More types of skin colors occur because of codominance and incomplete dominance. Just like how different mutations of colors occurred in flowers and animals. Copyright © 2008 by the National Center for Case Study Teaching in Science . Please see our usage guidelines , which outline our policy concerning permissible reproduction of this work. © Modeling Instruction - AMTA Unit 7 - Heredity 3

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