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Reaching the Age of Adolescence — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceReaching the Age of Adolescence1 Mark
MCQ
A human gamete has ________ sex chromosome$(s).$
  • A
    Half
  • ✓
    One
  • C
    Two
  • D
    Four
✓

Answer

Correct option: B.
One

A human cell has $46$ chromosomes in total. Out of these 46 chromosomes, $44$ are autosomes and $2$ are sex chromosomes. Chromosomes occur in pairs and thus there are $23$ pairs. A cell having $23$ pairs of the chromosome is called diploid. Diploid cells undergo division and their number reduces to half, i.e. produce haploid cells having only $23.$

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