STB 313 Theory Questions: Population Genetics and Plant Breeding: Key Concepts and Applications

300 Level Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.

Questions:

a) State factors affecting changes in gene frequency in population
b) In tomatoes, red fruit is dominant over yellow, two-located fruit over many-located, and tall vines over dwarf. A breeder has a pure race of red, two-located, dwarf plants and of yellow, many-located, tall ones. He wants a race of red, many-located, tall plants. If he crosses his two races and raises an F₁ and an F₂:

• • What proportion of F₂ will be in appearance the type he desires?

  • What proportion of these will be homozygous for all these characters?

  • How can he determine which are the homozygous plants?

c) Explain inbreeding and its implications in plant breeding

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