AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Meiosis occurs in two stages:meiosis I and
A
mitosis
B
meiosis II
C
interphase
D
S phase
Explanation: 

Detailed explanation-1: -In each of these phases, there is a prophase, a metaphase, and anaphase and a telophase. In meiosis I these are known as prophase I, metaphase I, anaphase I and telophase I, while in meiosis II they are known as prophase II, metaphase II, anaphase II and telophase II.

Detailed explanation-2: -There are two divisions in meiosis; the first division is meiosis I: the number of cells is doubled but the number of chromosomes is not. This results in 1/2 as many chromosomes per cell. The second division is meiosis II: this division is like mitosis; the number of chromosomes does not get reduced.

Detailed explanation-3: -In meiosis II, the phases are, again, analogous to mitosis: prophase II, metaphase II, anaphase II, and telophase II (see figure below).

Detailed explanation-4: -Because meiosis begins with one diploid parent cell and ends with four haploid daughter cells, two division stages are needed: these divisions are called meiosis I and meiosis II. Genetic reassortment occurs during meiosis I.

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