Which of the following genotypes would provide us with a round seed phenotype?

Name _________________________ Date __________________

BIO 151L Quiz 6: Heredity

1. Matching: Match the following with the appropriate definition. (5 points)

____ Genotype a. When there is 1 recessive and 1 dominant allele present

____ Phenotype b. Alternative form of a gene located on chromosomes

____ Allele c. When either 2 recessive or dominant alleles are present

____ Homozygous d. An individual’s observable traits

____ Heterozygous e. Genetic makeup of an organism

2. When an allele is expressed regardless of its allelic partner, we call this allele (2 points)

a. Incomplete

b. Polygenic

c. Recessive

d. Dominant

3. In pea plants, round seeds (R) are dominant to dented seeds (r). Complete the following mono-hybrid Punnett square and use this cross to complete questions 4-6. (4 points)

R r
R
r

4. Which of the following genotypes would provide us with a round seed phenotype? (1 point)

a. RR

b. Rr

c. rr

d. A and B

e. B and C

5. In a genetic cross of two plants that are heterozygous for the seed shape trait, what fraction of the offspring should have round seeds? (1 point)

a. 1/4

b. 1/2

c. 3/4

d. All

6. What fraction of the offspring should have dented seeds? (2 points)

a. 1/4

b. 1/2

c. 3/4

d. All