Question

A chromosome entering meiosis is composed of two sister chromatids, each of which is a single DNA molecule. At the end of meiosis II, how many chromatids are there per cell (enter a number)?

Answer 1

QUESTION-1

ANSWER-

A chromosome entering meiosis is composed of two sister chromatids, each of which is a single DNA molecule. At the end of meiosis II, there will be 23 chromatids per cell.

EXPLANATION

The goal of the cell cycle is to produce new cells by means of growth, DNA replication and cell division.

Mitosis produces daughter cells identical to the mother and this is the basis of asexual reproduction.

Meiosis shuffles the genes through recombination and daughter cells produced are genetically different from the mother. The chromosome numbers are halved and this is the basis of sexual reproduction.

Meiosis has two phases- Meiosis-I and meiosis-II.

Meiosis-I reduces the chromosome number from diploid to haploid whereas meiosis-II produces four haploid daughter cells.

At the end of Meiosis-I, there will be 23 chromosomes and 46 chromatids per cell.

At the end of meiosis-II, there will be 23 chromosomes and 23 chromatids per cell.

Meiosis-I has stages like prophase-I, metaphase-I, anaphase-I, and telophase-I and cytokinesis.

Meiosis-II has stages like prophase-II, metaphase-II, anaphase-II, and telophase-II and cytokinesis.

GOOD LUCK.