A couple are both heterozygous for the dominant allele for polydactyly. They want to have three children. What is the
probability that all three children will have polydactyly?
a. 3/4
b. 9/64
c. 1/64
d. 27/64
e. 1/2
ANSWER: d
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A. equilibrium model. B. species-area effect. C. time hypothesis. D. organismic model. E. principle of species individuality.
Chromosomes become visible during prophase of
mitosis as a result of a. uncoiling. b. DNA synthesis. c. condensation. d. chromatid duplication. e. addition of proteins to the DNA
Why is a drop in blood pressure potentially dangerous?
A. Once pressure drops, it can take hours to increase it again. B. Low blood pressure leads to gas bubbles in the blood that can cause a stroke or the "bends". C. If pressure is not high enough, blood vessels collapse and can become stuck closed. D. Active cells, like those in the brain, need a continuous supply of oxygen and nutrients.
Name three familial conflicts
What will be an ideal response?