Question

Which pair has haploid nature?
a. Sperm and egg cells
b. Skin and muscle cells
c. Blood cells and nerve cells
d. Heart and nerve cells

Answer 1

Haploid cells are those cells which contain only one set of chromosomes. Diploid cells are those in which there would be two sets of chromosomes. Haploid cells are represented as n diploid cells are represented as 2n. If a cell contains more than two sets of chromosomes, it is called polyploidy.

Complete Answer:
The cells of the body which are somatic are diploid in nature. That means, the cells that do not participate in the process of reproduction contain two sets of chromosomes and hence are diploid. These are the cells that undergo mitosis.
The germ cells of the body are haploid in nature. That means, the cells that participate in the process of reproduction contain only one set of chromosomes and hence are haploid. These are the cells that undergo meiosis.
The germ cells fuse to form a zygote that is diploid in nature, which grows up to be a whole organism
Examples of diploid cells are: Somatic cells like Skin cells, muscle cells, blood cells , heart cells, nerve cells.
Examples of haploid cells are: Germ cells that is Egg and Sperm cells

Hence, The correct answer is a) Egg and sperm cells are haploid in nature.

Note:
The diploid cells contain 2n sets of chromosomes and haploid n. In humans, haploid set n is 23 (pairs) and hence the diploid cells 2n would be 46. The reproductive cells the ovum and the sperm are haploid fusing to form diploid zygote.