Question

Meiotic cell division replicates a cell's DNA ____________ and then divides ______________.

a) Twice, once
b) Once, twice
c) Twice, twice
d) Once, once
e) No answer is correct

Answer 1

Meiotic cell division involves one round of DNA replication followed by two rounds of division, resulting in four haploid daughter cells. Therefore, the correct answer is b) Once, twice.

Step-by-step explanation:

Meiotic cell division replicates a cell's DNA once and then divides twice. The correct answer to the question is option b) Once, twice. Prior to meiosis, the cell's DNA is replicated once during the S-phase of the cell cycle. Following this, meiosis I and meiosis II occur, which are two consecutive rounds of nuclear division. Meiosis I separates the homologous chromosomes, and meiosis II, much like in mitosis, separates the sister chromatids. This results in a total of four haploid daughter cells that are genetically distinct from one another. Regarding the review question, a diploid cell has twice the number of chromosomes as a haploid cell. Consequently, the answer to that question is b) half, since a haploid cell has half the number of chromosomes of a diploid cell.