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Question
Which is true for zygote?
Options:
A .  In all animals zygote develops inside the body
B .  Zygote contains DNA from both the parents
C .  Only the sperm contributes DNA to the zygote         
D .  In all animals zygote develops outside the body
Answer: Option B
:
B
Azygoteis a cell formedby the union of the ovum (i.e., egg cell)or the female gamete, and the spermor the male gamete. It contains the DNA from both its parents. The zygote then multiplies and develops through the process of cell division to form the embryo. The zygote is the first stage of development of the fertilised cell. While it is common for animals to keep the zygote inside their bodies, many animals including birds and most reptiles lay eggs, where the zygote eventually develops. Pregnancy starts once the zygote forms, and ends when the mother gives birth to the baby.

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