Which of these statements is correct about human sex, Ask an Expert

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Which of these statements is correct about human sex chromosomes?

Select one:

a. The Y chromosome has twice as many genes as the X.b. The Y chromosome is missing copies of genes present on the X.c. The X and Y chromosomes have the same gene content.d. Crossing over only occurs between the upper arms of the X and Y chromosome.e. none of these are correct

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Category:- Biology
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