Question

Assertion (A): The sex of a child in human beings will be determined by the type of chromosome he/she inherits from the father.

Reason (R): A child who inherits the ‘X’ chromosome from his father would be a girl (XX), while a child who inherits a ‘Y’ chromosome from the father would be a boy (XY).

• A. Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Answer 1

The correct option is A

Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).

The correct option is A.

Explanation of the correct option:

Assertion statement:

1. The chromosome that the male provides determines the biological sex (male or female) of the child.
2. The X or Y chromosome can be contributed by the male, who has XY sex chromosomes, whereas the X chromosome must be contributed by the female, who has XX sex chromosomes.
3. Depending on whether a man's sperm carries an X or Y chromosome, a baby's sex is determined.
4. A newborn girl (XX) is created when an X chromosome joins with the mother's X chromosome, while a boy is created; when a Y chromosome combines with the mother's (XY).

Reason statement:

1. A chromosome known as a sex chromosome is distinct from a typical autosome in terms of shape, size, and function.
2. When, two chromosomes—the X and the Y chromosome—determine whether you are a boy or a girl.
3. Sex chromosomes are referred to as: there are two X chromosomes in females.
4. Each male has one X and one Y chromosome.
5. As opposed to the sex chromosomes, an autosome is one of the numbered chromosomes.
6. Humans contain one pair of sex chromosomes and 22 pairs of autosomes (XX or XY).
7. In general, autosome numbers correspond to autosome sizes.
8. Since both pass through here and the sea is also present, we can save both are true.

Final answer: (A)Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).