Multiple Choice
In humans, is a typical skin cell haploid or diploid, and why?
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17. Meiosis and Sexual Reproduction
Basics of Meiotic Genetics
Multiple Choice
In basic meiotic genetics, what kind of cell has two copies of each chromosome (i.e., is diploid)?
A
A cell in which chromosomes have been replicated so it is considered haploid but with sister chromatids
B
A diploid cell (2n), such as a somatic cell
C
A haploid cell (n), such as a gamete
D
A cell that has undergone meiosis II, so it has two copies of each chromosome
Verified step by step guidance1
Understand the definition of diploid and haploid cells: Diploid cells (2n) contain two copies of each chromosome, one from each parent, while haploid cells (n) contain only one copy of each chromosome.
Recognize that somatic cells are typically diploid because they have two sets of chromosomes, one set inherited from each parent.
Note that after DNA replication, a cell still has the same ploidy level (diploid or haploid), but each chromosome consists of two sister chromatids; this does not change the ploidy number.
Recall that gametes (sperm and egg cells) are haploid, containing only one set of chromosomes, which is important for sexual reproduction to restore diploidy upon fertilization.
Understand that meiosis II results in haploid cells with single chromatids, not diploid cells, so a cell after meiosis II is haploid, not diploid.
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