Chromosomes and Gametes

  • Human Body Cells
  • Inheritance of the Sex Chromosomes
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  • Created by: Natasha
  • Created on: 12-04-11 14:53

Human Body Cells

Body cells contain 46 chromosomes

They are arranged as 23 pairs

Gametes are sex cells:

  • Female eggs
  • Male sperm

Gametes have 23 chromosomes - (one from each pair)

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PAIRS OF CHROMOSOMES IN A MALE


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Inheritance of the Sex Chromosome

Out of the 23 pairs of chromosomes in the human body, only 1 pair contains the sex chromosomes.

In females: XX - they are identical

  • ALL EGGS CARRY X CHROMOSOMES

In males: XY - Y is much shorter than X

  • HALF SPERM CARRY X CHROMOSOMES AND HALF CARRY Y CHROMOSOMES

Offspring inherit:

  • one sex chromosome from the mother
  • one sex chromosome from the father
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Diagrams

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