Introduction to Punnett Squares

Punnett Square Review

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Multiple Choice

Having dimples is a dominant trait (D). Not having dimples is recessive (d). Which of the following is a cross between a parent that doesn't have dimples and a parent that is homozygous dominant for dimples?

• Dd x Dd

• dd x DD

• dd x Dd

• DD x Dd

Multiple Choice

For some cattle species, having black hair (B) is dominant to red hair (b). Which of the following is a cross between two heterozygous parents?

• BB x bb

• BB x BB

• Bb x Bb

• Bb x bb

Multiple Select

Which of the Punnett Squares shows the cross for MM x mm? (Check all that apply.)

Fill in the Blank

What two letters go in the box highlighted yellow?

Fill in the Blank

What two letters go in the box highlighted yellow?

Multiple Choice

According to this Punnett Square, what is the percent chance of the offspring having the genotype Mm?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

According to this Punnett Square, what is the percent chance of the offspring having the genotype MM?

• 0%

• 25%

• 50%

• 75%

• 100%

Fill in the Blank

In dogs, if short hair (M) is dominant over long hair (m), what is the chance of the offspring having short hair according to this Punnett Square?

Fill in the Blank

In dogs, if short hair (M) is dominant over long hair (m), what is the chance of the offspring having long hair according to this Punnett Square?

Multiple Choice

According to the Punnett Square, what is the percent chance of the offspring being homozygous dominant?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

According to the Punnett Square, what is the percent chance of the offspring being heterozygous?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

According to the Punnett Square, what is the percent chance of the offspring being homozygous recessive?

• 0%

• 25%

• 50%

• 75%

• 100%