1. Unattached earlobes are a dominant trait. Finn and Maggie both have unattache

Question

1. Unattached earlobes are a dominant trait. Finn and Maggie both have unattached earlobes but their daughter, Celia, does not. If Finn and Maggie have a second child, what is the probability that it will have attached earlobes?
A. 1/4
B. 1/2
C. 3/4
D. 1
E. 1/8

2. Coat color in mice involves the effects of multiple gene interactions. If a mouse has two recessive alleles (aa) for coat color, it is always albino no matter what the genotype of other genes involved in coat color. This is an example of
A. pleiotropy.
B. incomplete dominance.
C. codominance.
D. epistasis.
E. heterosis.

3. Sex determination in birds and mammals is similar except that in birds, females are _______ while in mammals, females are _______.
A. heterogametic; homogametic
B. homogametic; heterogametic
C. haploid; heterogametic
D. diploid; heterogametic
E. None of the above

Explanation / Answer

c a d

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