Name: __________________________ Date: __________ Period: _______
Clyde and Claire Lab Questions (40 points)
Directions: Answer all questions in complete sentences and use your own words (you
and your partner should not have identical answers).
1. Are the traits we used in this lab inherited or acquired? Explain how you know
using evidence from the lab.
2. In pea plants, the gene for purple is dominant and the gene for white is recessive.
a. What is the genotype of a heterozygous purple-flowered pea plant? _____
b. What is the genotype of a white-flowered pea plant? _______
3. Is the following statement correct? Explain why or why not.
a. Statement: Because the offspring develops inside of the female, it will be
more like her.
4. During this lab, you may have noticed that some of Claire’s and Clyde’s offspring
looked more like one parent that the other. If each parent donates one gene for
each trait, how can this happen?
5. Hanging earlobes are dominant and attached earlobes are recessive. Complete a
Punnett square to show the possible offspring from a heterozygous male and a
homozygous recessive female.
6. What are the chances of these parents having an offspring with hanging earlobes?
7. If these parents have 4 offspring, is it POSSIBLE for all 4 to have attached
earlobes? Explain why or why not.
8. What are the possible genotype(s) for a person with attached earlobes?
9. What are the possible genotypes for a person with hanging earlobes?
10. Explain how it is possible for two brown-eyed parents to have a child with blue
eyes. Use a Punnett square to help you explain your answer.
11. Which parent actually determines the sex of the offspring? Explain how you know
using the XX and XY Punnett square.
12. Draw a Punnett square for each combination listed. Circle the Punnett square
that contains all 3 possible genotypes for the offspring.
a. HH X Hh
c. Hh x hh
b. HH X hh
d. Hh x Hh