NEET BIOLOGY

Detailed explanation-1: -Mature sperm contains 23 chromosomes.

Detailed explanation-2: -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-3: -Healthy humans have 46 chromosomes, 23 from the sperm and 23 from the egg. An embryo with the wrong number of chromosomes is usually miscarried, or develops disorders such as Down’s syndrome, which is caused by an extra copy of chromosome 21.

Detailed explanation-4: -Chromatin is packed in a specific way into the 23 chromosomes inside human spermatozoa.

Detailed explanation-5: -The other type of cell division, meiosis, ensures that humans have the same number of chromosomes in each generation. It is a two-step process that reduces the chromosome number by half-from 46 to 23-to form sperm and egg cells.