Which of the following best defines what occurs during translation?
a. RNA is used to make a polypeptide.
b. RNA is used to make a DNA strand.
c. DNA is used to make a polypeptide.
d. A polypeptide is used to make RNA.
Ans: a. RNA is used to make a polypeptide.
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Paland and Lynch showed that sexual populations possessed fewer deleterious mutations than asexual populations. These results supported the hypothesis that
A. sexual reproduction prevents fertilization with gametes carrying alleles with deleterious alleles. B. sexual reproduction produces fewer random mutations than asexual reproduction. C. asexual reproduction is associated with lower genetic diversity, resulting in the accumulation of highly deleterious mutations. D. in sexual reproduction, the reassorting of alleles allows for the elimination of more detrimental alleles than in asexual reproduction. E. sexual strains are associated with higher genetic diversity and thus accumulate more beneficial mutations than asexual strains.
Some flowers bloom in the spring, while others bloom in the summer. This is an example of reproductive isolation.
A. prezygotic B. sympatric C. allopatric D. parapatric E. postzygotic
Which of the following is most like an
endoskeleton?
a. the wooden frame of a house b. the covering of chair c. the hair of a dog d. the trunk of a tree e. an umbrella handle
Aneuploidy describes all of the following except
a. Turner syndrome. b. Klinefelter syndrome. c. translocation. d. XYY. e. Down syndrome.