Question

In humans, the composition of a zygote that will develop into a female is

• A. $44A+XX$
• B. $44A+XY$
• C. $22+X$
• D. $23A$

Answer 1

The correct option is A $44A+XX$

A zygote is diploid. Hence it will have 44 autosomes. A sperm can have either of the two sex chromosomes X or Y while the egg has only one sex chromosome X. If the sperm containing the X chromosome fuses with the egg, the child born will be a female. If the sperm containing the Y chromosome fuses with the egg the child born will be a male. Thus the correct answer is option A.