A man and woman of normal height have a son with achondroplasia. They want to have another child and wonder what the risk is that he or she will also have this form of dwarfism. The risk is
A) 0 percent.
B) the same as for any other child in the population.
C) 25 percent.
D) 50 percent.
B) the same as for any other child in the population.
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Which of the following hormones is indicative of the presence of a developing embryo and thus is the basis of home pregnancy tests?
A. hCG B. progesterone C. estradiol D. FSH E. LH
What is a characteristic of the cell walls of mature plant cells?
a. pectin b. cellulose c. glue-like polysaccharides d. lignin e. a gluey matrix containing rope-like strands
Which of the following is NOT true concerning genetic drift?
A. Genetic drift occurs when geographic barriers are broken down and populations can mix. B. Genetic drift is a random process. C. Allele fixation can happen in a population experiencing only genetic drift. D. Genetic drift may cause alleles to disappear completely.
Insulin lowers blood sugar. If insulin levels are high shortly after a meal, we can conclude that insulin secretion is regulated by ________ feedback mechanisms
Fill in the blank(s) with correct word