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Indayshaine2004go
Answered

18.Human males have non identical sex chromosomes (XY) while females have identical ____chromosomes.

a. YY
b..ZZ
c. TT
d. XX​

Sagot :

Rhianmadeja2006go

Answer:

(D)

Explanation:

Females have two X chromosomes, while males have one X and one Y chromosome. Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells. This phenomenon is called X-inactivation or lyonization.

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