Genetics Worksheets Page 7

Genetics with a Smile 7

11. How would the smiley faces change if one of the parents were homozygous

dominant for all the traits while the other was heterozygous?

12. How would the smiley faces change if one of the parents were recessive for all the

traits while the other was heterozygous?

13. Uncle Smiley, who is heterozygous for a yellow face, married a woman with a green

face. Both of them have always wanted a large family! If they were to have 12 children,

what is the probability that the children would have yellow faces? How many would have

green faces? Create a Punnett square to help you find your answers.

An adaptation of an activity by T. Trimpe

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