Punnet Squares

AA Ao

AB Bo

A o

A B

Punnett squares such as the one shown above are used to determine the probabilities (percentages ) for genotypes of offspring given specific genotypes for the parents

A . In the example above , the Punnett 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

Fill out and turn in the Punnett square for AB x Ao above . And answer the following questions for the cross-represented

above . Make sure you understand the difference between 1phenotype (blood type ) and genotype . The Punnett Square shows the possible genotypes . When answering the questions , percent (probability ) calculations and your answers should be in terms of the phenotypes (the blood types ) and NOT the genotypes

1 . What are the possible blood types for the offspring

AA , Ao , AB , and Bo

2 . What are the ratios or percentages for each possible blood type from this cross 25 for each , respectively

3 . What blood type is not possible from this cross

O

B . Fill out the 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

AB AB

BB BB AB Ao

BB Bo What are the possible blood types for the cross between the type B...