Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Accidents During Meiosis Can Cause<br />
Chromosomal Abnormalities<br />
Nondisjunction: Chromosomes fail to separate.<br />
Members of a pair of homologous chromosomes fail to<br />
separate during meiosis I or:<br />
Sister chromatids fail to separate during meiosis II.<br />
Nondisjunction increases with age.<br />
Gametes (<strong>and</strong> zygotes) will have an extra<br />
chromosome, others will be missing a chromosome.<br />
Trisomy: Individuals with one extra chromosome, three<br />
instead of pair. Have 47 chromosomes in cells.<br />
Monosomy: Missing a chromosome, one instead of pair.<br />
Have 45 chromosomes in cells.
Change language