Download Complete Dominance Punnett Square Worksheet

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Complete Dominance Punnett Square Worksheet-Human Characteristics
Directions: Complete the following Punnett Squares. Be sure that you list the possible genotypes and
phenotypes of the offspring. Please also list the percentages of each phenotype.
Section A: Complete Dominance
1. Brown eyes is dominant to light eyes. Mr. O’Ryan has blue (light) eyes. Mrs. O’Ryan is heterozygous
for brown eyes. What are the eye color possibilities of their son, Kellan O’Ryan? *Use letter B.
Genotypes
Phenotypes
Percent
2. Dimples are dominant; no dimples are recessive. Mr. Dowling is heterozygous for dimples, and Mrs.
Dowling is also heterozygous for dimples. What are the possibilities of their offspring? *Use letter D.
Genotypes
Phenotypes
Percent
3. Free hanging earlobes (H) are dominant to attached (h). Mrs. Frost has attached earlobes. Mr. Frost is
homozygous for free hanging earlobes. What are the ear possibilities of the Frost children? *Use letter H.
Genotypes
Phenotypes
Percent
Complete Dominance Continued
1. Having your second toe shorter than the length of your big toe is dominant. (It is recessive to have the
big toe be shorter). Mrs. O’Ryan is heterozygous for having her second toe is shorter than her big toe. Mr.
O’Ryan is homozygous dominant. What are the possible outcomes for their children? *Use letter T.
Genotypes
Phenotypes
Percent
2. Dark hair (D) is dominant to light hair. Mrs. Crego is blonde (light hair) and Mr. Crego also has light
hair. What are the possible outcomes for their kids? *Use letter D.
Genotypes
Phenotypes
Percent
3. Tongue rolling is dominant to not being able to roll your tongue. Mr. Chonko can roll his tongue, and
his genotype is Tt. Mrs. Chonko cannot roll her tongue. What are the possible outcomes for the three
Chonko daughters? *Use letter T.
Genotypes
Phenotypes
Percent