CLEP CLEP Biology Cell Division: Mitosis and Meiosis 2

Question 1

How many rounds of nuclear division occur during meiosis?

Accepted Answer

Two

Answer

Meiosis involves two sequential rounds of division—meiosis I (reductional) and meiosis II (equational)—to produce four haploid cells from one diploid cell.

Question 2

Crossing over (recombination) between non-sister chromatids of homologous chromosomes occurs primarily during which stage?

Accepted Answer

Prophase I

Answer

During prophase I, homologous chromosomes synapse and crossing over occurs at chiasmata, creating recombinant chromosomes with new allele combinations.

Question 3

A human diploid cell (2n = 46) undergoes meiosis. How many chromosomes are present in each resulting gamete?

Accepted Answer

23

Answer

Meiosis reduces the chromosome number by half; each gamete receives one chromosome from each homologous pair, yielding 23 chromosomes (n = 23).

Question 4

Homologous chromosomes pair up to form bivalents (tetrads) during which phase of meiosis?

Accepted Answer

Prophase I

Answer

During prophase I, homologous chromosomes undergo synapsis facilitated by the synaptonemal complex, forming bivalents (each consisting of four chromatids).

Question 5

The separation of homologous chromosome pairs to opposite poles of the cell is the defining event of:

Accepted Answer

Anaphase of meiosis I

Answer

Anaphase I is the reductional step where homologs (not sister chromatids) are pulled apart, reducing the chromosome number in each half of the cell.

CLEP Practice Test

CLEP Practice Test

CLEP CLEP Biology Cell Division: Mitosis and Meiosis 2