Which of the following genetic changes would NOT be passed from parent to child?
a. a mutation in a skin cell
b. the loss of a chromosome in a sperm cell
c. the addition of a chromosome in an egg cell
d. a translocation in a gamete
Ans: a. a mutation in a skin cell
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Answer the following statement true (T) or false (F)
A possible reason why humans have fewer genes than the number anticipated by scientists is that
a. humans don’t need more than 25,000 genes to function. b. the exons used to make a specific mRNA can be rearranged to form different proteins. c. the sample size used to sequence the human genome was not big enough, so the number of genes estimated could be low. d. the number of genes will increase as scientists find out what all of the noncoding DNA actually does.
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When was the first documented case of HIV in the United States?
A. 1959 B. 1924 C. 1969 D. 1884 E. 1982