Meiosis - during their lifetime Secondary oocytes are released at ovulation The second meiotic division resumes after penetration by sperm In

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Meiosis Review haploid, diploid homologous chromosomes Types of Cell Division Mitosis produces identical daughter cells. Meiosis produces cells with 1/2 the number of chromosomes as the parent cell. Chromosome Doubling/DNA Replication Chromosomes double when they split at the end of metaphase. DNA replicates during the S period of interphase. Summary of Mitosis prophase - coil metaphase - align anaphase - separate telophase - uncoil
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Meiosis in human females begins before person is born but stops in prophase I and does not resume until after puberty. Each month, approximately 1000 primary oocytes will to mature but most will die. Ovulation occurs approximately once every 28 days. Females ovulate approximately 400 times
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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....
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Meiosis - during their lifetime Secondary oocytes are released at ovulation The second meiotic division resumes after penetration by sperm In

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