Punnett Squares Quiz

What is a Punnett Square used for in genetics?

• To determine the age of an organism

• To predict the probability of offspring inheriting particular traits

• To measure the size of DNA molecules

• To identify the sequence of genes

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DOK Level 1: Recall

In a monohybrid cross between two heterozygous individuals (Aa x Aa), what is the probability of obtaining a homozygous recessive offspring?

• 0%

• 25%

• 50%

• 75%

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DOK Level 2: Skill/Concept

Which of the following represents a heterozygous genotype?

• AA

• aa

• Aa

• A

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DOK Level 1: Recall

In incomplete dominance, what would be the phenotype of the offspring if a red flower (RR) is crossed with a white flower (WW)?

• Red

• White

• Pink

• Red and White

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DOK Level 2: Skill/Concept

What does the term "codominance" mean in genetics?

• One allele completely masks the other

• Both alleles are expressed equally in the phenotype

• The alleles blend to form an intermediate phenotype

• Neither allele is expressed

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DOK Level 1: Recall

If a black chicken (BB) is crossed with a white chicken (WW) and the offspring are all speckled black and white, what type of inheritance is this an example of?

• Complete dominance

• Incomplete dominance

• Codominance

• Recessive inheritance

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DOK Level 2: Skill/Concept

What is the expected genotypic ratio in the offspring of a monohybrid cross between two heterozygous parents (Aa x Aa)?

• 1:2:1

• 3:1

• 1:1

• 2:1

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DOK Level 2: Skill/Concept

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

• Aa x Aa

• AaBb x AaBb

• AA x BB

• Aa x BB

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DOK Level 1: Recall

In a Punnett Square, what do the letters outside the grid represent?

• The phenotypes of the parents

• The genotypes of the parents

• The phenotypes of the offspring

• The genotypes of the offspring

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DOK Level 1: Recall

If a plant with genotype Rr (round seeds) is crossed with a plant with genotype rr (wrinkled seeds), what is the probability of the offspring having round seeds?

• 0%

• 25%

• 50%

• 100%

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DOK Level 2: Skill/Concept