A person with the genotype XXXY would be expected to have how many Barr bodies?

A) 0
B) 1
C) 2
D) 3
E) 4


C) 2

Biology & Microbiology

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Viral size is generally measured in

A) micrometers. B) picometers. C) nanometers. D) centimeters.

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Who should be vaccinated against rabies?

A. Veterinarians B. Nurses C. Physicians D. Farmers

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With __________, an animal modifies a voluntary behavior in response to the behavior's

consequences. Fill in the blank(s) with the appropriate word(s).

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Why is it important that a few ?-galactosidase molecules be present in E. coli even if these cells have been growing on

a lactose-free medium? What will be an ideal response?

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