The nurse has completed a presentation on reproduction. Which participant's statement indicates that teaching has been successful?
1. "Ova separate into two unequally sized cells."
2. "A male is born with all the sperm he will ever produce."
3. "Females create new ova throughout their reproductive life."
4. "Each primary spermatocyte divides into four haploid cells."
1
Explanation:
1. Each ovum undergoes meiotic division just prior to being released from the graafian follicle. Each cell created by this meiosis has the same number of chromosomes, but the cytoplasm does not split equally. This causes a polar body to be produced along with a secondary oocyte.
2. Males begin spermatogenesis at puberty and continue throughout their life. Each sperm divides into four haploid cells.
3. Females are born with all the ova they will ever produce. The ova begin to be formed in early fetal life. One ovum is released each month during the reproductive life of a female, from menarche to menopause.
4. Primary spermatocytes contain 46 chromosomes (46XY). Each primary spermatocyte undergoes meiotic division into two haploid secondary spermatocytes (22X or 22Y).
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