Genetics Problem: Punnett Squares & Blood Types

A. APunnett
Square represents a cross (mating) between a male (on the left side) with blood
type AB, and a female, (top of square), with blood type A, genotype Ao.

Answer the following for the cross represented above.

1. What are
the possible blood types for the offspring?

2. What are
the ratios or percentages for each possible blood type from this cross?

3. What
blood type is not possible from this cross?

B. Fill out
two Punnett squares for a cross between a male with blood type B and a female
with blood type AB. (Note that we do not know if the father is genotype BB or
Bo from the information given. Thus there are two solutions to the possible
cross.)

Set up two Punnett squares and answer the following
questions about them.

1. What are
the possible blood types for the cross between the type B (BB or Bo?) male and
AB female?

2. What are
the percentages (%) or probabilities for each blood type in the offspring?

3. What
blood type(s) would not be possible in a cross between these two parents?

Hint: There are two answers for questions 1 & 2 above
and only one for 3.

Turn in the Punnett Squares and your answers to the
questions.

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