3 3 1 Outline The Roles Of Sutton And Boveri In Identifying

Sutton and Boveri Yeet ya Yeet

Theodor Boveri:

• German Biologist and cytologist
• Did not only rely on observations but also manipulated aspects of the experiment
• Carried out experiments with sea urchin eggs
  • Studying the behaviour of cell nucleus and chromosomes, during fertilisation and meiosis

Why Sea urchins?

• Ideal for experiment due to easy fertilisation
• quick larval development (48hrs)

The findings:

• Nucleus of both gametes contribute the same amount (50% each) of chromosomes to the zygote
  • Demonstrated connection between chromosomes and heredity

• when a sperm and egg fused, resulting offspring expressed characteristics of both parents
• a complete set of chromosomes is needed for normal development
• inheritance factors are found on chromosomes
• Chromosomes are the carriers of heredity

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Walter Sutton:

• Studied meiosis in the cells of grasshoppers
• Was a young unknown graduate

Findings:

• Chromosomes occur in distinct pairs
  • Visible during meiosis in grasshopper cells
  • One is paternal the other maternal

• During meiosis, the chromosome number is halved and each gamete receives one chromosome from each pair
• fertilisation restore the full number of chromosome in the zygote
  • 'Hereditary units'
• Chromosome arrange themselves independently along the middle of the cell and assort independently
• Chromosomes are units of inheritance

- Nathaniel Tran
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