QQuestion
Select the correct pair in the case of humans:
(a) Normal pattern of chromosome of ovum — 22A + XX
(b) Normal pattern of chromosome of ovum — 22A + Y
(c) Normal pattern of chromosome of ovum — 22A + X
(d) Normal pattern of chromosome of ovum — 22A + XY
✓Answer
(c) Normal pattern of chromosome of ovum — 22A + X
Explanation
The ovum (female gamete) has 22 autosomes (A) and one X chromosome, i.e., 22A + X. Y chromosome is only present in the male gamete (sperm). The presence of XY or XX determines the sex of the individual after fertilization.
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