Who is a carrier of an X-linked trait?
a. homozygous dominant female
b. heterozygous female
c. homozygous recessive female
d. homozygous male
e. heterozygous male
ANSWER: b
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The essence of meiosis is that
a. gametes receive one copy of each member of each pair of homologous chromosomes. b. diploid gametes are formed. c. each gamete receives one member of each pair of homologous chromosomes. d. haploid gametes are formed. e. each gamete receives one member of each pair of homologous chromosomes, and haploid gametes are formed.
An enzyme maintains a rigid structure while catalyzing a reaction.
a. true b. false
Which of the following foods would be least likely to contribute to the development of heart disease?
A) margarine B) butter C) bacon D) fish oil
The greatest incidence of skin cancer (melanoma) would be expected to occur in
A) people who are deficient in vitamin D and live near the poles. B) people who are deficient in folate and live near the poles. C) people who are deficient in vitamin D and live near the equator. D) people who are deficient in folate and live near the equator.