Oogenesis

Hmm, indeed. Egg for the win - just look at the wastage produced during oogenesis and limited numbers they are produced in!

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so oogenesis is same with the ovum genesis?

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Someone correct me if I'm wrong, but I think the correct term is oogenesis.

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... but are essential to the evolutanary process..Why? (Q4) What evidence is there that states that Downs syndrom is a result of non-disjunction at oogenesis rather than spermatogenesis? (Q5) Humans with aneuploid karyotypes occur but are non-viable. Why is this?? I know there are quite a few questions, ...

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... spread free, eventually growing into an adult form. It actually does not differ much in essence from more complex reproduction in some senses, the oogenesis and spermatogenesis is just the growth and release of cells by specialized tissues, but the cells achieved a higher degree of specialization, ...

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