What does a diploid cell contain?

A diploid cell contains two sets of chromosomes, which is why this answer is correct. In humans and many other organisms, a diploid cell has pairs of homologous chromosomes, with one set inherited from each parent. This characteristic is crucial for sexual reproduction, as diploid cells can undergo meiosis to produce haploid gametes, ensuring genetic diversity in the offspring.

In contrast, a haploid cell, which contains only one set of chromosomes, plays a different role in reproduction. Cells with three or four sets of chromosomes are considered polyploid, which occurs in certain species and can lead to different biological functions and characteristics, but they are not classified as diploid. Understanding the definition and role of diploid cells is fundamental in genetics and biology.