1. If your genotype is Bb, what type of trait would you express as phenotype? a. dominant b. recessive c. both a and b d. neither a nor b 2. If your genotype is BB, what type of trait would you express as phenotype? a. dominant b. recessive c. both a and b d. neither a nor b 3. If a baby goat received a dominant gene for curly hair from one parent, and a recessive gene for straight hair from the other, which trait will the baby goat display? a. No hair b. Curly hair c. Straight hair d. Straight and curly hair
1. If your genotype is Bb, what type of trait would you express as
a. dominant b. recessive c. both a and b d. neither a nor b
2. If your genotype is BB, what type of trait would you express as phenotype?
a. dominant b. recessive c. both a and b d. neither a nor b
3. If a baby goat received a dominant gene for curly hair from one parent, and a recessive gene for straight hair from the other, which trait will the baby goat display?
a. No hair b. Curly hair c. Straight hair d. Straight and curly hair
4. The allele for yellow seeds in pea plants, Y, is dominant. The allele for green seeds in pea plants, y, is recessive. Which combination would produce a plant with green seeds?
a. YY b. Yy c. yY d. yy
5. In humans, the allele for brown eyes, B, is dominant over the allele for blue eyes, b. Which combination of alleles shown below could result in a person with blue eyes?
a. BB b. Bb c. bB d. bb
6. Which of the following crosses would always result in offspring that only display the dominant phenotype?
a. TT x tt b. Tt x Tt c. TT x TT d. Both a and c
7. What would be the dimensions of a Punnett Square depicting a dihybrid cross?
a. 1 x 4 b. 2 x 4 c. 4 x 4 d. 2 x 2
8. In dihybrid crosses of heterozygous parents, the ratio 9:3:3:1 indicates ___.
a. codominance c. incomplete dominance
b. independent assortment d. three alleles for each trait
For the next four questions, use the following key:
a = All the offspring will exhibit the dominant trait. c = The recessive trait will show up in about 50% of the offspring.
b = All the offspring will exhibit the recessive trait. d = The dominant trait will show up in about 75% of the offspring.
What will be the result if:
9. Bb mates with bb?
10. BB mates with bb?
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