Punnett Squares, Drawn

Work out what the offspring can inherit by reading the square.

8 questions, free, marked as you go with a worked explanation on every one.

What this covers

The questions

  1. Look at the Punnett square. What are the genotypes of the two parents?
  2. Using the square shown, out of 100 offspring how many would you expect to be homozygous recessive?
  3. Using the same square, out of 100 offspring how many would you expect to show the dominant trait?
  4. Using the same square, what fraction of the offspring carry the recessive letter without showing the trait?
  5. A breeder crosses the two parents in the square many times and gets no recessive offspring at all in the first eight. What is the best explanation?
  6. Which statements about the square shown are correct? Select all that apply.
  7. If one parent in the square were changed to AA instead, what would happen to the offspring?
  8. Why does a population with more variation in it survive a new disease better?

Answer these free