This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: during their lifetime. Secondary oocytes are released at ovulation. The second meiotic division resumes after penetration by sperm. In humans, secondary oocytes are fertilized. Eggs are produced only after fertilization of a secondary oocyte. In the diagram above, the first polar body produced after the first meiotic division did not divide again. Women are born with all of the primary oocytes that they will ever have (2 million). At puberty, there are approximately 400,000 left. Some chromosomal abnormalities associated with maternal age may be due to the long time they remain paired during prophase I....
View Full Document