Punnett Squares

Test Description: Punnett Square Practice

Instructions: Answer all questions to get your test result.

1) If two heterozygous individuals are mated, what percentage of their offspring will have the dominant phenotype?

2) A husband and wife are going to have a baby. The husband has type AB blood, and the wife has type O. Which could NOT be the blood type of their child?

3) Fluffy fur is a dominant trait in guinea pigs. Two fluffy guinea pigs have a non-fluffy offspring. What must be the genotypes of the parents?

4) A heterozygous individual is mated with a homozygous recessive individual. What percentage of their children will be heterozygous?

5) The probability of a human couple having a male child is:

6) A normal woman with a colorblind father marries a normal man. What is the probability that her child (who will be a male), will be colorblind?

7) Hemophilia is a sex-linked trait. What is the probability of a diseased female and a normal male producing a healthy child?

8) Having more than 5 fingers (Polydactyly) is a dominant trait. What is the probability that two people, each of which have 5 fingers per limb,will have a 6-fingered child?

9) Cuteness is a dominant trait in bunnies. Two bunnies heterozygous for cuteness have numerous offspring. What percentage of the offspring would be predicted to not be cute?

10) The genotype of a carrier of a sex-linked disease would be:


*select an answer for all questions

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