Studies of sex chromosome aneuploidy reveal that ____ necessary for survival

a. the X chromosome is not
b. the Y chromosome is not
c. two copies of the X chromosome are
d. two copies of the Y chromosome are
e. at least one copy of both the X and the Y chromosome is


b

Biology & Microbiology

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Which of these five evolutionary forces is rare and usually not considered by population geneticists?

A. mutation B. selection C. non-random mating D. genetic drift E. immigration

Biology & Microbiology

Which of the following were the first vertebrates to appear on land?

A. amphibians B. non-avian reptiles C. birds D. mammals E. fish

Biology & Microbiology

The laboratory procedure for copying selected segments of DNA is 

A. the polymerase chain reaction. B. translation. C. jumping genes. D. a point mutation.

Biology & Microbiology

If you tagged organic carbon inside a chloroplast with a fluorescent label, the location most likely to have a high concentration of labeled carbon would be in the

A. between the outer and inner membranes. B. stroma. C. inside the thylakoid. D. thylakoid membrane.

Biology & Microbiology