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CBSE Class 10 Answered

how ??????/
Asked by 2joseph | 23 Oct, 2009, 06:33: AM
Expert Answer

One sperm never enters the female reproductive system alone. Several thousands are introduced into the vagina, of which a few reach the fallopian tube and usually only one fertilises the egg, resulting in the formation of a zygote. Sometimes this zygote divides into 2 embryos, resulting in twins. The two embryos develop into fetuses sharing the same womb.

Answered by | 23 Oct, 2009, 01:36: PM
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