Genetics Quiz

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Genetics Quiz

• 1. Show the Square for the following cross. A
  woman who is heterozygous for type A blood and
  also heterozygous RH has a child with a man who
  has type AB blood and who is RH -.
• 2. Give the phenotypic ratio
• 3. Give the genotypic ratio.
• 4. What is the probability that these 2
  individuals will have 3 children in a row who are
  Blood Type B-?

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Male Drosophilia melongaster(Fruit Fly)
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Male Drosophilia
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Female Drosophilia melongaster(Fruit Fly)
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Female Drosophilia
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Why use Drosophilia for Genetic Studies?
1. Cheap 2. Short Life Cycle (Fast Reproductive
Cycle) 3. Small 4. Lots of Variable Traits 5.
Only a few Chromosomes
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Life Cycle of Drosophilia

• 1. Egg (Hatch after 1 day)
• 2. Larva (Wormlike, may be in this
  stage for several days)
• 3. Pupa (Undergoes Metamorphosis)
  
• 4. Adult
• Entire cycle lasts about 12 days. Adult flies
  may live for a month or more.

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Life Cycle of Drosophilia