AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following happens at the conclusion of meiosis I?
A
Homologous chromosomes are separated.
B
The chromosome number per cell is conserved.
C
Sister chromatids are separated.
D
Four daughter cells are formed
Explanation: 

Detailed explanation-1: -Four daughter cells are formed.

Detailed explanation-2: -Meiosis I ends when the chromosomes of each homologous pair arrive at opposing poles of the cell. The microtubules disintegrate, and a new nuclear membrane forms around each haploid set of chromosomes. The chromosomes uncoil, forming chromatin again, and cytokinesis occurs, forming two non-identical daughter cells.

Detailed explanation-3: -During meiosis, the homologous chromosomes are separated in Meiosis I. Specifically, the homologous chromosomes are separated during Anaphase I stage of Meiosis I. At this stage, the homologous chromosomes separate but the sister chromatids remain attached at their centromere.

Detailed explanation-4: -The homologous chromosomes separate into different nuclei during meiosis I, causing a reduction of ploidy level in the first division. The second division of meiosis is more similar to a mitotic division, except that the daughter cells do not contain identical genomes because of crossover.

Detailed explanation-5: -During meiosis I, homologous chromosomes are separated. Subsequently, during meiosis II, the sister chromatids separate to produce a total of four products, each with half the number of chromosomes as the original cell.

There is 1 question to complete.