Heredity Punnett Squares and Pedigrees

What does a half shaded in circle or square represent on a pedigree?

• Someone who carries a gene for the trait.

• Someone who has the trait.

• Someone who has no genes for the trait.

• Someone who has died.

What do the circles and squares represent on a pedigree chart?

• Squares have the trait, circles are carriers.

• Squares are females, circles are males.

• Circles are females, squares are males.

• Circles have the trait, squares are carriers.

T - tall and t = short

In the Punnett square shown, what belongs in the missing square?

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-1

How many generations are shown in this pedigree?

• 1

• 2

• 3

• 4

How many males are color-blind in this family?

• 2

• 3

• 4

• 5

Tags

NGSS.HS-LS3-2

How many females are carriers in this family?

• 1

• 2

• 3

• 4

How many males in this pedigree chart show the trait?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS3-1

Heterozygous is when __________________________.

• the alleles are the same

• the alleles are different

• the alleles are absent

• the alleles are present

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive

• dominant

• lower case letter

• both 

B = brown fur and b = white fur

In the Punnett square, what is the probability for white fur?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2