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B
Spermatogenesis
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C
Spermiogenesis
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D
Somatic hybridization
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Solution
The correct option is A Oogenesis The primordial germ cells divide to form the primary oocyte which has the ploidy of 2n.
The primary oocytes grow in size and then undergoes its first meiotic division and form the secondary oocyte and the first polar body. The moiety is now reduced to n and the cells are now haploid.
The secondary oocyte again undergoes meiosis II and forms the ovum and a second polar body.