A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be (a) 46
(b) 23
(c) 21
(d) 42
Answers
normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be 46.
ANSWER:
Option B – 23 is the correct answer.
EXPLANATION:
• Chromosome is a component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome. There are typically 23 pairs of chromosomes in each cell.
• Chromosomes have genes present on them, which are responsible for providing specific traits from parents to offsprings.
• Normal, a parent cell which is diploid (2n) produces gametes which are haploid (n) in nature.
• Though, the parent body cell is haploid but the cell which produces gametes are diploid in nature and they undergo meiosis to produce haploid gametes.
Therefore, though a normal cell of human body contains 23 pairs of chromosomes i.e., haploid (n) but the gamete producing parent cell will be having 46 chromosomes (diploid – 2n) and will undergo meiosis to produce gametes which will have 23 (haploid - n) number of chromosomes.
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