Explain about the meiosis-2 occuring in oogenesis. When & where does it happen? Is meiosis-2 the basis for difference between secondary oocyte and ovum?

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Q. Following statements are given w.r.t. gametogenesis.
(a) Meiosis

1^{s t}

occurs in primary oocyte
(b) Meiosis

2^{n d}

may start but can’t be completed in virgin woman’s secondary oocyte
(c) Meiosis

1^{s t}

is completed in follicular phase of menstrual cycle
(d) Meiosis

2^{n d}

produces three polar bodies and one ovum
From above

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What is vitellogenesis and where does it occur a)primary oocyte in graafian follicle b)secondary oocyte in fallopian tube

Q. What happen if meiosis does not occur in the organisms?

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