3. A population of chrysanthemums has two colors: purple, which is dominant, and

Question

3. A population of chrysanthemums has two colors: purple, which is dominant, and white, which is recessive. The frequency of the dominant allele is 0.4. If there are 100 plants in this population, approximately how many of them should be homozygous recessive for flower color?
a. 13
b. 36
c. 49
d. 72

4. Blubber is a thick layer of fat tissue found under the skin of all elephant seals, conveying an
advantage in making them tolerate cold water temperatures. This trait has a strong genetic
basis, and all elephant seals have the genotype that produces blubber. Is this trait currently
undergoing selection?
a. Probably, because it confers an advantage
b. Probably not, because it is now produced by the seals

Explanation / Answer

3. c.49 4. b. Probably not, because it is now produced by the seals’ environment rather than genes

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