What makes the Y chromosome unusual?

Question

what makes the Y chromosome unusual?

a) it has very few genes

b)it does not attach to spindle fibers at mitosis

c)it does not attach to spindle fibers at meiosis

d)it does not attach to spindle fibers at mitosis or miosis

e)it undergoes more recombination than any other chromosome.

Answer 1

The answer is a) it has very few genes. It contains only 86, while the X chromosome has close to 1,000.

The Y chromosome attaches to the spindle fibers at both mitosis and meiosis, and because recombination between the X chromosome and the Y chromosome is potentially harmful, the Y chromosome has changed in such a way as to inhibit recombination with the X chromosome. 95% of the chromosome is unable to recombine.

P.S. Try to post your question on the correct board next time. This should have been under biology instead of botany. You'll get more answers that way.