AP BIOLOGY

Detailed explanation-1: -Secondary oocyte completes meiosis II and produces one functional ovum and second polar body . First and second polar bodies are nonfunctional cells; so, oogenesis produce one functional egg cell in each round.

Detailed explanation-2: -Maturation into ovum Both polar bodies disintegrate at the end of Meiosis II, leaving only the ootid, which then eventually undergoes maturation into a mature ovum.

Detailed explanation-3: -Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells, maintaining the number of chromosomes in each cell.

Detailed explanation-4: -Soon afterward, the first meiotic division occurs, and the mature ovum is released from the ovary by a process called ovulation. The ovulated egg is in second meiotic metaphase when it is released (Figure 19.24).

Detailed explanation-5: -The final phase of oogenesis includes the second phase of meiosis (meiosis II) during which the secondary oocyte, or mature egg cell, is produced. This stage occurs after puberty. All three phases of oogenesis occur within the ovary.