Human sperm cells and egg cells are
a) haploid, each containing 23 chromosomes
b) haploid, each containing 46 chromosomes
c) diploid, each containing 23 chromosomes
d) diploid, each containing 46 chromosomes

Human sperm cells and egg cells each contain 23 chromosomes.

When egg and sperm cells combine, they create diploid cells, each containing 46 chromosomes

The correct answer is A. haploid, each containing 23 chromosomes.

A) Haploid, each containing 23 chromosomes.

Explanation:

The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).