Suppose a human egg is fertilised by a sperm. If, immediately after fertilisation,the zygote is divided into two separate cells, then this process would result in
Correct answer: C. Identical twins
- A. Fragmentation
- B. Fraternal twins
- C. Identical twins
- D. Parthenogenesis
Explanation
The correct answer is identical twins. When a single zygote divides into two separate cells after fertilization, it results in identical twins, as both cells develop into genetically identical individuals. Fragmentation is unrelated to human zygote division, as it pertains to organisms that reproduce asexually. Fraternal twins result from two different eggs being fertilized by different sperm. Parthenogenesis is an asexual reproduction process that does not involve fertilization and is not relevant to human reproduction.
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About Embryonic Development
Embryonic development begins after fertilization with cleavage and formation of the morula and blastula, followed by gastrulation and the establishment of germ layers. It includes organ formation, tissue differentiation and early growth, rather than the later increase in size associated with postnatal development.
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