Question

In females until puberty:

A. secondary oocytes are suspended in meiosis I

B. secondary oocytes are suspended in meisosis II

C. primary oocytes are suspended in meisos I

D. primary oocytes are suspended in meisosis II

Answer 1

Answer : There can only be a single answer for this question and the rest of the options will be totally irrelevant. To answer this question we must know the logic of Oogenesis. The female gametes formed in the ovaries by meiosis is oogenesis. The cells in the ovaries differentiate called as Oogonia. The oogonia enter a growth phase, enlarge and become primary oocytes. The primary oocytes replicate their DNA and begin their first meiotic division but the process stops in the prophase stage itself and the cells remains suspended until puberty. Considering this logic we can understand that the options such as primary oocytes are suspended in meiosis II is incorrect because meiosis II happens only when secondary oocytes are formed and if fertilization occurs so it is a condition after puberty occurs. Similarly the first two options such as secondary oocytes are suspended in meiosis I and secondary oocytes are suspended in meiosis II are also wrong because when secondary oocytes are formed ovulation happens which is after puberty and the process suspends in the metaphase which continues with fertilization to meiosis II. All these options are wrong as puberty has already occured

Thus the correct answer to this question in females until puberty is Option C) Primary oocytes are suspended in meiosis I.