If a human zygote has Y-chromosome but it lacks the SRY gene. What will be the sex of the child?

Male

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Female

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Intersex

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Depends upon the surrounding temperature

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Solution

The correct option is B Female
If the Y chromosome lacks the SRY gene the sex of the child would be female and development of uterus and fallopian tubes will take place. SRY gene is responsible for the development of functional testes.
The SRY is located in the short arm of the Y chromosome and codes for a factor called testis determining factor(TDF).

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Question 8
A zygote which has an X-chromosome inherited from the father will develop into a

(a) boy
(b) girl
(c) X- chromosome does not determine the sex of a child
(d) either boy or girl

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