Pea Pod Genetics and Alleles

What is the dominant allele for color in pea pods?

• Blue allele, large B

• Red allele, large R

• Green allele, large G

• Yellow allele, little g

In a pure breeding green pea pod, what is the genotype?

• gg

• gG

• GG

• Gg

What is the phenotype of the F1 generation when a pure green pea pod is crossed with a pure yellow pea pod?

• All yellow

• All green

• Half green, half yellow

• Three green, one yellow

What is the genotype of the F1 generation when a pure green pea pod is crossed with a pure yellow pea pod?

• gG

• gg

• Gg

• GG

In the F2 generation, what is the expected ratio of green to yellow pea pods?

• 4:0

• 2:2

• 3:1

• 1:1

What does a heterozygous genotype mean?

• Three alleles

• No alleles

• Two different alleles

• Two identical alleles

What is the purpose of a test cross?

• To determine the phenotype

• To determine the genotype

• To determine the color

• To determine the size

If a test cross results in all green offspring, what is the genotype of the unknown parent?

• Gg

• GG

• gG

• gg

What is the genotype of a homozygous recessive pea pod?

• GG

• Gg

• gG

• gg

If half of the offspring from a test cross are yellow, what is the genotype of the unknown parent?

• Gg

• gg

• gG

• GG