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प्रश्न
Assertion (A): The male is not responsible for the sex of the baby (boy or girl) which is born.
Reason (R): A male has one X chromosome and one Y chromosome whereas a female has two X chromosomes. XX combinations of sex chromosomes leads to a baby girl but the XY combinations of sex chromosomes leads to a baby boy.
पर्याय
Both A and R are true and R is correct explanation of the assertion.
Both A and R are true but R is not the correct explanation of the assertion.
A is true but R is false.
A is false but R is true.
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उत्तर
A is false but R is true.
Explanation:
The male determines the sex of the child because the female always produces eggs carrying an X chromosome, whereas the male produces sperm carrying either an X or a Y chromosome. Fertilization by an X-bearing sperm results in a girl (XX), while fertilization by a Y-bearing sperm results in a boy (XY). Therefore, Assertion (A) is false.
A human male has one X and one Y chromosome (XY), whereas a female has two X chromosomes (XX). The XX combination produces a girl and the XY combination produces a boy. Therefore, Reason (R) is true.
Hence, A is false but R is true.
