When does sex determination occur in humans?

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Question

(B) In humans,sex determination is genetic and occurs at the time of fertilization.When a sperm carrying either an $X$ or a $Y$ chromosome fertilizes

Vedclass · Accepted Answer

At the time of fertilization

Vedclass · Answer

(B) In humans,sex determination is genetic and occurs at the time of fertilization.When a sperm carrying either an $X$ or a $Y$ chromosome fertilizes an egg (which always carries an $X$ chromosome),the sex of the zygote is decided.If an $X$-bearing sperm fertilizes the egg,the zygote becomes $XX$ (female).If a $Y$-bearing sperm fertilizes the egg,the zygote becomes $XY$ (male).Therefore,the sex is determined at the moment of fusion of the male and female gametes.

Similar Questions

In which of the following is parthenogenesis observed?

Assertion : In humans,the gamete contributed by the male determines whether the child produced will be male or female.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.

$A$ medical technician, while observing a human blood smear under the microscope, notes the presence of a Barr body close to the nuclear membrane in the $WBC$. This indicates that the person under investigation is:

$A$ man who carries a sex-linked gene on his $Y$ chromosome will transmit this gene to:

The type of sex determination in honey bees is:

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