Punnett Square quiz

A red flower (Rr) is crossed with a yellow flower (rr).

• red flower is homozygous

• Yellow flower is dominant

• Red flower is heterozygous

• Yellow flower is heterozygous

A round seed (RR) is crossed with a wrinkled seed (rr). What are the phenotypes of the offspring?

• 2 Round; 2 wrinkle

• 4 Round; 0 wrinkled

• 0 Round; 4 wrinkled

• 3 round; 1 wrinkled

A tall plant (Tt) is crossed with a short plant (tt). What are the phenotypes of the parents?

• Tall; short

• 2 tall

• 2 short

• green; yellow

A yellow flower (YY) is crossed with a white flower (yy). The parents are....

• both heterozygous

• one heterozygous; one homozygous

• both homozygous

• both yellow

A blue flower (bb) is crossed with a blue flower (bb). Based on the parents, what is your best guess to the genotype of the offspring?

• 4 BB

• 2 BB; 2 bb

• 4 bb

• 3 bb; 1 Bb

A black bear (Bb) is crossed with a black bear (BB). What is the probability of a black bear offspring?

• 4:4

• 2:4

• 3:1

• 1:4

A homozygous dominant red flower is crossed with a heterozygous red flower (white is the

recessive color). What is the genotype of the parents?

• Rw; Rw

• RR; Rw

• RR; Rr

• RR; rr

Two heterozygous green (the white flower is recessive) flowers are crossed. Write the genotype

• 2 Gg

• Gw; GG

• GG; Gg

• 2 Gw

A homozygous tall plant is crossed with a heterozygous tall plant (short is the recessive size). What is the best guess at the offspring phenotype?

• 4 tall

• 2 tall; 2 short

• 3 tall; 1 short

• 4 short

A heterozygous white rabbit is crossed with a homozygous black rabbit. What are the genotypes of the parents?

• Ww; bb

• Ww; ww

• BB; bb

• Bb; bb