Punnett Square Practice Problems

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %

• 25%

• 50%

• 75%

Having dimples (D) is dominate to not having dimples (d). What percent of the offspring will have dimples if you cross two parents that are heterozygous?

• 25%

• 50%

• 75%

• 100%

Having dimples (D) is dominate to not having dimples (d). What percent of the offspring will have a pure dominant genotype if you cross two parents that are heterozygous?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS4-3

Having dimples (D) is dominate to not having dimples (d). What percent of the offspring will have a heterozygous genotype if you cross two parents that are heterozygous?

• 25%

• 50%

• 75%

• 100%

If you cross a pure yellow skin alien (YY) with a green skin alien (YB) what percent of the offspring will be yellow?

• 0%

• 25%

• 50%

• 75%

• 100%

If you cross a pure yellow skin alien (YY) with a green skin alien (YB) what percent of the offspring will be green?

• 0%

• 25%

• 50%

• 75%

• 100%

In a species of fish some fish have red scales (R) and some have blue scales (B). In the hybrid genotype the offspring have both red and blue scales. What percent of the offspring will be pure red scales if you cross a pure red fish (RR) with a hybrid red and blue fish (RB).

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a species of fish some fish have red scales (R) and some have blue scales (B). In the hybrid genotype the offspring have both red and blue scales. What percent of the offspring will have a hybrid genotype if you cross a pure rd fish (RR) with a pure blue fish (BB).

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a species of fish some fish have red scales (R) and some have blue scales (B). In the hybrid genotype the offspring have both red and blue scales. What percent of the offspring will be pure red phenotype if you cross two hybrid genotypes.

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.MS-LS3-2

In fruit flies, the coloration of tan with black stripes (B) is dominant to a solid black body color (b). A biologist crosses a tan male with black stripes and a female with a solid black body color. Which stated observation can lead the biologist to the stated conclusion about the genotype of the male fruit fly in this cross?

• Observation: All the offspring are black.

  Conclusion: The male has two recessive alleles (bb).

• Observation: Half the offspring are black.

  Conclusion: The male has two dominant alleles (BB).

• Observation: All the offspring are tan with black stripes.

  Conclusion: The male has two dominant alleles (BB).

• Observation: Most of the offspring are tan with black stripes.

  Conclusion: The male has two dominant alleles (BB).

Tags

NGSS.HS-LS3-1