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Diploid 2 complete sets of genes (chromosomes); Diploid in humans = 46 (all body cells)

Diploid 2 complete sets of genes (chromosomes); Diploid in humans = 46 (all body cells). Haploid 1 set of genes (chromosomes); Haploid in humans = 23 (only sex cells). Gamete. sex (reproductive) cells Ovum (egg) = Female Sperm = Male Gametes only have 1 set of chromosomes in each cell.

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Diploid 2 complete sets of genes (chromosomes); Diploid in humans = 46 (all body cells)

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  1. Diploid2 complete sets of genes (chromosomes); Diploid in humans = 46(all body cells) Haploid1 set of genes (chromosomes); Haploid in humans = 23 (only sex cells)

  2. Gamete • sex (reproductive) cells • Ovum (egg) = Female • Sperm = Male • Gametes only have 1 set of chromosomes in each cell

  3. Crossing Over • Homologous chromosomes swap genes to increase genetic diversity • Begins during Prophase I • Ends when the chromosomes separate during Anaphase I

  4. Nondisjunction • If the chromosomes fail to separateafter crossing over DURING ANAPHASE I,Nondisjunctionwilloccur. • Nondisjunction can also occur during ANAPHASE II if the sister chromatids do not separate. • Nondisjunction causes conditions like Downs Syndrome (Trisomy 21)

  5. Nondisjunction

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