Punnett Square Practice Test

Use the chart to find the phenotype of someone with geotype YY.

• Blue

• Yellow

• YY

• yy

Tags

NGSS.MS-LS3-2

S = square body s = round body

What must be true if the observed phenotype is a square body?

• The genoype MUST be SS.

• The genotype must be ss.

• There is at least one S present.

• Both parents had the genotype ss.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If G=green and g=yellow, which statement is true?

• There is a 0% probability offspring will be yellow.

• All peas will have a yellow phenotype.

• There is a 50% probability of getting homozygous offspring.

• Green and yellow will mix to make blue pea pods.

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

What kind of complex inheritance is shown in the picture?

• blended inheritance

• codominance

• incomplete dominance

• polygenic inheritance

What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?

• All purple flowers

• All white flowers

• White flowers with purple dots

• Tall stem flowers

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

Straight hair is a recessive trait and curly hair is a dominant trait.  A woman with curly hair marries a homozygous recessive man. 

What is the probability that they will have children with curly hair?

• 100%

• 75%

• 50%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A farmer who raises vegetables wants to cross two types of corn plants.  The male plant is a hybrid with red kernels and the other plant is homozygous recessive with white kernels.  What is the probability of the offspring having red kernels?

• 100%

• 75%

• 50%

• 0%

What genotype goes in box 4?

• DD

• Dd

• dd

• dD