NEET BIOLOGY

Detailed explanation-1: -only one set of chromosomes is present in them. So, egg and sperm of humans will have only 23 chromosomes.

Detailed explanation-2: -Chromosomes come in pairs. Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). Half come from the mother; the other half come from the father. Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born.

Detailed explanation-3: -In meiosis, a cell containing the diploid number of chromosomes is converted into four cells, each having the haploid number of chromosomes. In human cells undergoing meiosis, for instance, a cell containing 46 chromosomes yields four cells, each with 23 chromosomes.

Detailed explanation-4: -The sperm is a haploid cell means it contains half the number of chromosome of the parent cell. A human contains 46 chromosomes in it. Thus, mature sperm contains 23 chromosomes. After fusing with the egg (haploid cell), the sperm (haploid cell) forms zygote which is diploid.

Detailed explanation-5: -A normal human cell has 23 pairs of chromosomes. So, a total of 46 chromosomes. At the bivalent stage, each chromosome has two chromatids. So, a total of 92 chromatids will be there in a human cell at the bivalent stage.