What is the reason calico cats are almost always female?
A) inactivation of the X chromosome
B) lack of a Y chromosome in females
C) activation of the calico gene by the female sex hormone estrogen
D) inactivation of the calico gene in males by the sex hormone testosterone
E) a mutation on the X chromosome
Correct Answer:
Verified
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A)RNA polymerase
B)DNA
C)messenger
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Q60: Which of the following contains codons?
A)ribosomal RNA
B)DNA
C)messenger
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A)different
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