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What are the number of chromosomes in a human male germ cell?
46 pairs of Chromosomes
23 pairs of Chromosomes
23 Chromosomes
46 Chromosomes
23 Chromosomes
Human male germ cells (sperm cells) are haploid, meaning they contain half the number of chromosomes found in regular body (somatic) cells. Since a normal human somatic cell has 46 chromosomes (23 pairs), a germ cell contains 23 chromosomes.
Human male germ cells (sperm cells) are haploid, meaning they contain half the number of chromosomes found in regular body (somatic) cells. Since a normal human somatic cell has 46 chromosomes (23 pairs), a germ cell contains 23 chromosomes.
Think of a somatic cell as a complete 'instruction manual' containing two sets of pages (pairs). Meiosis is like taking this manual, photocopying only one set of unique pages, and creating a 'starter kit' for a new individual.
2n=46 тАФ diploid number in human somatic cells
n=23 тАФ haploid number in human germ cells
Germ cells are produced through meiosis, a specialized type of cell division that reduces the chromosome number by half. During meiosis, homologous chromosomes pair up and then separate, ensuring each daughter cell receives exactly one set of 23 chromosomes. This process is essential for sexual reproduction, as it ensures that the fusion of a sperm (23) and an egg (23) restores the diploid count of 46 in the zygote.
Somatic cells are diploid (2n), while gametes are haploid (n).
Meiosis results in four haploid daughter cells.
Fertilization restores the diploid state (23 + 23 = 46).
Prevents doubling of chromosome number in each generation.
Allows for genetic diversity through crossing over.
Sexual reproduction in humans
Formation of sperms (spermatogenesis)
| Feature | Somatic Cell | Germ Cell |
|---|---|---|
Cell Type | 46 (Diploid) | 23 (Haploid) |
Somatic cells (like skin or liver cells) undergo mitosis and maintain 46 chromosomes.
Option A (46 pairs) is incorrect as it describes 92 chromosomes.
Option B (23 pairs) describes somatic cells, not germ cells.
Option D (46) is the count for regular body cells.
C is correct тАФ Human male germ cells are haploid and contain 23 chromosomes.
Remember: Germ cells = Gametes = Haploid = Half the set. Always distinguish between 'pairs' and 'total count' in biology MCQs.
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