Punnett Square Review '22

Albinism is a recessive genetic condition in which

a person lacks pigment that gives color to the

skin. If the allele for albinism is represented as

"a," and the functional allele is represented as

"A," what will be the genotype of a person with

albinism?

• Aa or AA

• Aa or aa

• aa

• AA

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If a male cat that is heterozygous for polydactyly

(Pp) mates with a female that is homozygous for

polydactyly (pp), what are the possible genotypes

of their first generation of offspring?

• PP and pp, only

• Pp and pp, only

• PP, Pp, and pp

• Pp, only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Homozygous is a term used to describe what

condition in heredity?

• Different alleles.

• Hybrid alleles.

• Same alleles.

• Recessive alleles.

A homozygous dominant parent and a

homozygous recessive parent have offspring.

What is true about the offspring?

• The offspring are homozygous

• The offspring make up the F2 generation.

• The offspring make up the parental generation.

• The offspring are heterozygous.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If the genotype of an individual is "Yy", what

conclusion can be drawn?

• The individual is heterozygous.

• The individual is homozygous.

• The individual is recessive

• The individual is a phenotype.

A pea plant's seed shape is round. What can be

said about this trait?

• It is a recessive trait.

• It is the phenotype.

• It is the genotype.

• It is a hybrid.

What are all of the possible genotypes of

offspring with a cross between a pure

homozygous dominant pea plant (GG) with a

pure homozygous recessive pea plant (gg)?

• GG, Gg, and gg

• Gg, only

• GG, only

• GG and gg

Tags

NGSS.HS-LS3-1

Albino rabbits are rabbits that don't have any

pigmentation in their fur or eyes. Their eyes

appear pink and their fur appears pure white. The

gene for albinism is a recessive gene. If an albino

rabbit (bb) breeds with a brown rabbit (Bb), what

is the percent chance that they will produce an

albino rabbit?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A homozygous brown mouse mates with a

heterozygous brown mouse. The allele for brown

fur (B) is dominant over the allele for tan fur (b).

What percentage of the offspring will most likely

have brown fur?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following genotypes is heterozygous?

• Aa

• aa

• AA

• A