A monohybrid cross is a mating between two individuals that are both
A. homozygous for one gene.
B. heterozygous for one gene.
C. homozygous for two genes.
D. heterozygous for two genes.
E. None of the answer choices is correct.
Accessibility:
B. heterozygous for one gene.
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Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b). If you mate a black guinea pig with a homozygous brown guinea pig, what proportion of the progeny will be homozygous?
A) none B) 1/4 C) 1/2 D) 3/4 E) all
Which of the following plants are among those
that contributed to the formation of coal?
a. horsetails b. peat mosses c. conifers d. angiosperm trees e. more than one of these
Selective toxicity refers to damage to
A. prokaryotic cell membranes. B. the target organisms but not vertebrate cells. C. pathogenic organisms. D. nucleic acids.
What does the presence of similar genes in very dissimilar organisms imply?
a. the genes were produced by different selection pressures b. the organisms share a common ancestor c. the organisms do not share a common ancestor d. the genes became identical through mutation