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The Cell and its Inheritance

Explore how chromosomes and meiosis play a crucial role in genetic inheritance, with a focus on Walter Sutton's discoveries in Mrs. Wharton's science class. Learn how sex cells have half the chromosomes of body cells, leading to offspring inheriting the correct number of chromosomes from parents.

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The Cell and its Inheritance

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  1. The Cell and its Inheritance Mrs. Wharton’s Science Class

  2. Walter Sutton • Obseved sex cells have HALF the number of chromosomes as body cells • Offspring had the exact number of chromosomes in its body cells as its parents • Chromosomes in body cells actually occurred in pairs, one chromosome in each pair coming from the male and one from the female

  3. His Conclusions • Genes are located on chromosomes • Chromosome Theory of Inheritance- genes are carried from parents to offspring on chromosomes

  4. Meiosis • How organisms produce sex cells • Meiosis- process by which the number of chromosomes are reduced by half to form sex cells- sperm and eggs. • During meiosis the chromosome pairs separate and are distributed to two different cells.The resulting sex cells only have half as many chromosomes as the other cells in the organism.

  5. Result • When they combine each sex cell contributes half the number of chromosomes to producce offspring with the correct number of chromosomes. • Punnett squares show the result of meiosis..

  6. Chromosomes • Chromosomes are made up of many genes joined together like beads on a string. • Each gene controls a particular trait.

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