Four of the five answers listed below describe the gene makeup. Select the exception
a. pure-breeding
b. homozygous
c. heterozygous
d. carrier
e. phenotype
E
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Menstruation begins in response to ____
a. rising levels of FSH and LH b. rising levels of GnRH c. rising levels of progesterone d. falling levels of progesterone e. rising levels of estrogen
A translocation involving chromosome 21 can result in
A. a risk for Down syndrome independent of maternal age. B. a risk for Down syndrome dependent on paternal age. C. no increased risk outside of maternal age. D. lowering the risk of Down syndrome. E. no change in the risk for Down syndrome.
Which of the following mRNA has four codons?
A. AAACCCGGGUUU B. AU GC AA GG C. A U C G D. A AA UUU GGC
Which of the following have features that show morphological convergence?
A. Sharks, penguins, and porpoises B. Panthers and tigers C. Apes and monkeys D. Sharks, skates, and rays E. Mice, rats, and gerbils