alleryOn approximately which day after conception does differentiation of embryonic stem cells begin?
A60th day
B2nd day
C30th day
D14th day
Answer & Solution
Correct answer: D. 14th day
1. Embryonic cells divide repeatedly by mitosis after the zygote forms.
2. Cell differentiation begins from the 14th day of conception.
3. The 2nd day is too early, while the 30th and 60th days are too late for the onset of differentiation.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 8 "Cell Biology and Biotechnology", p.98_
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