Question

For a diploid human cell, state how many copies of each chromosome are present in each cell (or soon to be daughter cell)? a) start of mitosis b) end of mitosis c) start of meiosis d) end of meiosis e) end of meiosis ll

Answer 1

The answer to these questions are given below:

Explanation:

In a diploid human cell, there are `23` pairs of chromosomes. Each chromosome is in duplicate, and one chromosome each is inherited from male and female parent.

Two chromosomes in each pair are identical to each other in length, position of centromere, and the genes located on these. However, the two alleles of a gene may be the same or different (homozygous or heterozygous)

The copies of each chromosome present in each cell:

• In the beginning of mitosis, there are two copies of each chromosome with duplicated genetic material in prophase stage.
• At the end of mitosis, two copies of each chromosome in each of the two daughter cells have formed.
• At the end of meiosis-I, two copies of each chromosome exist..
• At the end of meiosis-II, one copy of each chromosome is present in each of the four daughter cells formed.

Each of the four daughter cells formed are haploid (`23` chromosomes).