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Genetics Homework

HOMEWORK:

D = dimpled chin                                              E = free ear lobes

d = non-dimpled chin                                     e = attached ear lobes

 

1)      Two people who have dimpled chins produce a child who doesn’t have a dimpled chin.  (Show your Punnett square.)

a.       What is the genotype of the child?

b.      What is the genotype of the father?

c.       What is the genotype of the mother?

2)      A man with attached ear lobes marries a woman who is heterozygous for free ear lobes.  What type of offspring and in what proportion (or ratio) would be expected? (Show your Punnett square.)

3)      A man who is heterozygous for a dimpled chin and who has attached ear lobes marries a woman who is heterozygous for dimpled chin but is homozygous for free ear lobes.  What is the phenotypic ratio of their offspring? (Show your Punnett square.)

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