Punnett Square

What percentage of the offspring will have freckles?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.MS-LS3-2

What percentage of the offspring will not have freckles?

• 25%

• 50%

• 75%

• 100%

What trait would a Mm have?

• dimples

• no dimples

What trait would a gg have?

• not have hemophilia

• have hemophilia

What is Ww considered?

• Heterozygous for widows peak

• heterozygous for straight hairline

• homozygous for widows peak

• homozygous for straight hairline

• recessive for straight hairline

Tags

NGSS.HS-LS3-1

What is WW considered?

• Heterozygous for widows peak

• heterozygous for straight hairline

• homozygous for widows peak

• homozygous for straight hairline

• recessive for straight hairline

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This Punnett square shows a cross between two heterozygous tall plants, where T indicates the dominant allele. Which choice describes the phenotypes of the offspring?

• They have a 25% chance of being tall.

• They have a 50% chance of being tall.

• They have a 75% chance of being tall.

• They have a 100% chance of being tall.

This Punnett square shows a cross between a black cow (Bb) and a white cow (bb). What phenotypes result from this cross?

• 100% black cows

• 100% white cows

• 75% black cows; 25% white cows

• 50% black cows; 50% white cows

This Punnett square represents a cross between two organisms.

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For this trait, red (R) is dominant to white (r). Which choice represents the phenotypes of the offspring organisms?

• all red organisms

• all white organisms

• 75% red organisms and 25% white organisms

• 50% red organisms and 50% white organisms

This Punnett square shows a cross between two heterozygous parent plants.
In this species of plants, petal color is a codominant trait. Red (R) petal color is dominant, white (r) petal color is recessive, and heterozygous plants (Rr) display pink petals. What is the percentage chance that offspring plants from the two parents plants shown in the Punnett square above will produce plants with pink petals?

• 25%

• 50%

• 75%

• 100%