Punnett Square Practice Problems Challenge

Dr. Chasseur reviews homework questions on genetics, focusing on simple dominance and Punnett squares. The video covers genetic crosses involving pea plants, mice, and rabbits, explaining how to determine genotypes and phenotypes. Students are encouraged to contact Dr. Chasseur for further questions.

What is the probability of getting a yellow pea plant when crossing a heterozygous green pea plant with a homozygous yellow pea plant?

• 25%

• 50%

• 75%

• 100%

In a cross between a homozygous dominant tall pea plant and a heterozygous tall pea plant, what percentage of the offspring will be tall?

• 100%

• 75%

• 50%

• 25%

When crossing a homozygous dominant brown mouse with a heterozygous brown mouse, what is the probability of getting a tan mouse?

• 50%

• 75%

• 25%

• 0%

What is the genotype of a white rabbit if white fur is dominant and brown fur is recessive?

• BB

• Bb

• bb

• Both BB and Bb

In a cross between two heterozygous white rabbits, what is the probability of getting a brown rabbit?

• 75%

• 0%

• 25%

• 50%

Tags

NGSS.MS-LS4-4

What is the phenotype of a plant with the genotype big T little T if tall is dominant and short is recessive?

• Tall

• Short

• Medium

• Cannot be determined

If a homozygous tall plant is crossed with a heterozygous tall plant, what is the genotype ratio of the offspring?

• 3:1

• 1:2:1

• 2:2

• 1:1

What is the probability of getting a red flower when crossing two heterozygous red flowers, if white is recessive?

• 25%

• 50%

• 100%

• 75%

In a cross between a heterozygous white rabbit and a homozygous black rabbit, what is the probability of getting a white rabbit?

• 75%

• 25%

• 0%

• 50%

What is the genotype of a homozygous dominant brown mouse?

• bb

• B

• BB

• Bb