Answer:
The
sex of an infant is determined by the type of sex chromosome contributed by the
male gamete. A male produces two types of sperms-one type bears 22 + X
composition and the other, 22 + Y, Therefore, a male have 50% sperms with
X-chromosomes and other 50% with Y-chromosome.
Any one of the two types of sperms can fertilize the egg. If a Y-bearing
sperm fertilizes the egg, the zygote will be XY (male) and when an X-bearing
sperm fertilizes the egg, the resulting zygote will be XX (female). Since the
ratio of X-chromosome and Y-chromosome in male gamete is 50 : 50. The
statistical probability of male or a female infant is also 50: 50.
You need to login to perform this action.
You will be redirected in
3 sec