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


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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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Diploid 2 complete sets of genes chromosomes diploid in humans 46 all body cells

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)


Gamete

Gamete

  • sex (reproductive) cells

  • Ovum (egg) = Female

  • Sperm = Male

  • Gametes only have 1 set of chromosomes in each cell


Crossing over

Crossing Over

  • Homologous chromosomes swap genes to increase genetic diversity

  • Begins during Prophase I

  • Ends when the chromosomes separate during Anaphase I


Nondisjunction

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)


Nondisjunction1

Nondisjunction


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