Question

If an XXY human underwent meiosis, which below could represent the genotypes of the 4 gametes produced with respect to the X and Y chromosomes? (Assume meiosis occurs normally)

X ; X ; X ; Y

X ; X ; XY ; XY

XX ; XX ; YY ; --

X ; X ; -- ; Y

Answer 1

Answer:

X ; X ; XY ; XY

Explanation:

By the end of meiosis I, two cells are formed. One cell consists of X&Y chromosomes and the second cell consists of only X-chromosome.

After the end of meiosis II, XY-chromosomes bearing cell produces two cells, each with X&Y chromosomes.

X-chromsome bearing cell also produces two cells, each with one X-chromosme.

Therfore, finally four gametes are as follows:

X ; X ; XY ; XY