The key point in Darwin's proposal is that the ________ imposes the conditions that determine the direction of selection.
A. gene
B. parent
C. individual
D. environment
Answer: D
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A person who believes that the universe is at least partially controlled by super natural powers can best be described
(a) teleologist. (b) vitalist. (c) empiricist. (d) mechanist.
Charlie, an Angus bull, is heterozygous (Bb) for coat color, where B = black and b = brown. Charlie therefore has a black coat. Black is Charlie's
A) genotype. B) heterozygous state. C) gene conversion. D) phenotype. E) homozygous state.
An embryo develops from the
a. blastomere. b. gastrula. c. syncytiotrophoblast. d. trophoblast. e. inner cell mass.
Nearsightedness is dominant to normal vision and hazel eyes are dominant to blue eyes. A nearsighted woman with hazel eyes who is heterozygous for both traits marries a man with normal vision and hazel eyes. His genotype for eye color is the same as his wife's. Their three children all have blue eyes and normal vision. What is the probability that their next child will have blue eyes and be nearsighted?
A. 1/2 B. 3/8 C. 1/4 D. 5/8 E. 1/8