A plant feeding insect species colonizes two different hosts, I and II, in the same habitat

Host preference is determined by a single locus, (A), and the ability to detoxify plant defensive compounds is determined by a second unlinked locus, (B). Genotypes A/A, and A/a prefer host I, whereas genotype a/a prefers host II. Genotypes B/B and B/b can detoxify compounds from host I but not II, whereas b/b can detoxify the com-pounds of host II but not of host I. Why may sexual reproduction come with a cost in this system?
a. The offspring of A/A;B/B individuals mating with a/a;b/b will suffer fitness consequences on host I.
b. A cross of A/a;B/b x A/a;B/b will produce A/A;b/b offspring.
c. Any mating of an A/a;B/B individual with a partner sharing the same host preference will result in offspring that is maladapted to either host.
d. A mating of an A/a;B/B individual with a partner sharing the same host preference can result in offspring that is maladapted to either host.


D

Biology & Microbiology

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The structures that will exchange nutrients and

wastes with maternal blood are indicated by a. A. b. B. c. C. d. D. e. E.

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Mesophyll tissue is part of the root system of a plant.

Answer the following statement true (T) or false (F)

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