Genetics: Punnett Squares and Likelihood

Having a Widow's Peak is dominant (P) over not (p). If parent A (PP) and parent B (pp) have a child, what is the likelihood that--

• Pp

• The child will not have a widow's peak

• 100%

• The genotype of these children

• 0%

• The child will have a widow's peak

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Webbed fingers (F) are dominant over nonwebbed fingers (f). If parent A (Ff) and parent B (Ff) have children, which of the following are true? Select the correct Genotype and Phenotype outcomes.

• Phenotypes: 75% chance of having webbed fingers and 25% chance of not.

• Phenotypes: 100% chance of having webbed fingers and 0% chance of not.

• Phenotypes: 25% chance of having webbed fingers and 75% chance of not

• Genotypes: FF 25%, Ff 50%, ff 25%

• Genotypes: FF 75%, Ff 50%, ff 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

For a certain plant: G = green, g = yellow

Groups:

(a) Plant will be green

,

(b) Plant will be yellow

• GG

• gg

• Gg

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Brown eyes (B) tend to be dominant whereas blue eyes (b) tend to be recessive. Parents with heterozygous genes want to know: what is the likelihood of them having a child with blue eyes?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Two heterozygous (Tt) tall pea plants are crossed. Tall (T) is dominant. Short (t) is recessive. Which is the likelihood of each phenotype?

• 50% tall and 50% short

• 75% tall and 25% short

• 100% short

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following would complete this Punnett Square?

• aa

• AA

• Aa

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Brown eyes are dominant (B) to blue (b). If Parent A (bb) and Parent B (Bb) have a child, what is the likelihood that the child will have brown eyes?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Select TWO answers. Which are the missing parts?

• BB

• bb

• Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following must be the father's genotype?

• RR

• Rr

• rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If the father is homozygous recessive for dimples, what must the mother be for this Punnett Square?

• Dd (Heterozygous)

• DD (Homozygous Dominant)

• dd (Homozygous Recessive)

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2