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In intra cytoplasmic sperm injection, an embryo is formed in the laboratory by
Aplacing many sperms around the ovum
Bsplitting an early embryo into halves
Cinjecting a sperm directly into the ovum
Dfreezing the ovum before fertilisation
Answer & Solution
Correct answer: C. injecting a sperm directly into the ovum
1. Some infertility arises from the sperm being unable to fertilise on its own.
2. Intra cytoplasmic sperm injection is a specialised laboratory procedure for that situation.
3. In it a sperm is directly injected into the ovum to form an embryo.
4. This differs from standard in vitro fertilisation, where sperms surround the ovum and one penetrates it.
5. The abbreviation is ICSI.
_Source: NCERT Class 12 Biology Ch3 'Reproductive Health', section 3.5_
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