Monohybrid Crosses Punnett Squares

What is a characteristic of Punnett squares?

• They are predictions

• They always give accurate results

• They determine the genotype of an organism

• They are used for monohybrid crosses only

What is the genotype ratio of the offspring in a monohybrid cross between two heterozygous guinea pigs?

• HH: 2 Hh: 1 hh

• HH: 1 Hh: 1 hh

• 2HH: 1 Hh: 1 hh

• 2HH: 2 Hh: 1 hh

Tags

NGSS.HS-LS3-1

What is the phenotype of a guinea pig with the genotype Hh?

• Hairless

• Has hair

• Cannot be determined

• Depends on the other parent's genotype

Tags

NGSS.HS-LS3-1

In a monohybrid cross, what does the term "F1 generation" refer to?

• The first generation of offspring

• The parental generation

• The second generation of offspring

• The generation with the most genetic variation

What does a Punnett Square show?

• The actual results of a genetic cross.

• The potential genotypes of the offspring from a genetic cross.

• The physical characteristics of the offspring.

• The dominant alleles in a population.

Which of the following is an example of a monohybrid cross?

Which of the following alleles is homozygous recessive?

• Tt

• tt

• TT

• T

What is the probability of a hairless guinea pig in a monohybrid cross between two heterozygous guinea pigs?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-3

In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.

What is the phenotype of the offspring in box 3?

• Brown

• Black

• A mixture of brown and black

• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the expected genotypic ratio resulting from a heterozygous x heterozygous monohybrid cross?

• 2:1

• 1:3:1

• 1:2

• 1:0