Question

Which statement/s is/are correct regarding the sex chromosomes
of humans?
i. A male has one X chromosome and one Y chromosome.
ii. A female has two Y chromosomes.
iii. A male has only Y chromosomes.
iv. Gametes formed by a female has only X chromosomes.

b. Only i and ii
c. Only ii and iv
d. Only i and iv
e. Only iii and iv

Answer 1

i. A male has one X chromosome and one Y chromosome

e. Only iii and iv

Answer 2

Answer:

d. Only i and iv.

Explanation:

• Humans typically have 46 chromosomes, or 23 pairs of them in each cell. The appearance of twenty-two of these pairs, known as autosomes, is the same in both sexes. Males and females have different 23rd pair sex chromosomes. Males have one X and one Y chromosome, while females have two copies of the X chromosome.
• According to size, there are 22 autosomes. The sex chromosomes are represented by the other two chromosomes, X and Y. A karyotype is a representation of the human chromosomes arranged in pairs.
• A specific form of chromosome involved in determining sex is called a sex chromosome. The two sex chromosomes, X and Y, found in humans and the majority of other mammals, together define an individual's sex.

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