A haploid cell contains only one complete set of chromosomes, which means it has half the number of chromosomes compared to diploid cells. In humans, a haploid cell has 23 chromosomes. On the other hand, a diploid cell has two complete sets of chromosomes, one from each parent, totaling 46 chromosomes in humans.
One example of a haploid cell is a human sperm or egg cell, which plays a crucial role in sexual reproduction. When these gametes combine during fertilization, they form a diploid zygote. An example of a diploid cell would be a typical somatic cell in the human body, such as a skin cell, which carries the full set of 46 chromosomes.