Question

Gametes are usually __________.

• A. Haploid
• B. Diploid
• C. Polyploid
• D. Nulliploid

Answer 1

The correct option is A

Haploid

The correct option is A

Explanation of the correct option:

1. Gametes are usually haploid. In diploid organisms, gametes are produced by the process of meiosis whereas in haploids these are produced by mitotic cell division.
2. Gametes are haploid to restore the constant chromosome number in an individual formed after the fusion of two gametes.

Explanation of the incorrect option:

Option B:

Gametes cannot be diploid because diploid gametes after fusion will produce 4n sets of chromosomes which will disturb the constant chromosomal number in an individual.

Option C:

1. Polyploidy means to possess more than two complete sets of chromosomes.
2. This condition is not possible in gametes because it will disrupt the inheritance of the constant chromosome set.

Option D:

A gamete is a single cell with n number of chromosomes therefore, it cannot be nulliploid which means having no chromosome at all.

Final answer: Gametes are usually haploid.