Pedigree Practice

Is this trait (the shaded individuals) dominant or recessive?

• dominant
• recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What do half colored symbols represent?

• The individual is a carrier.
• The individual expresses the trait.
• The individual has both recessive alleles.
• The individual has both dominant alleles.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Examine the pedigree. The allele for the presence of a widow’s peak is dominant. Therefore, we can tell from the chart that in the couple labeled 2:

• the male is heterozygous and the female is homozygous.
• the male is homozygous and the female is heterozygous.
• the male is homozygous and the female is homozygous.
• the male is heterozygous and the female is heterozygous.

Tags

NGSS.HS-LS3-1

How many generations are shown in this pedigree?

• 1
• 2
• 3
• 4

Give the genotype for person II-1, for this autosomal trait.

• GG

• Gg

• gg

• we cannot be 100% sure of the genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

There are no carriers for Huntington's Disease - you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait? (hint - Every generation has a shaded person)

• Dominant

• Recessive

Tags

NGSS.HS-LS3-1

Examine the pedigree. The allele for the presence of a widow’s peak is dominant. Therefore, we can tell from the chart that in the couple labeled 2:

• the male is heterozygous and the female is homozygous.

• the male is homozygous and the female is heterozygous.

• Both the male and the female are homozygous.

• Both the male and the female are heterozygous.

Tags

NGSS.HS-LS3-1

What is the genotype of the father?

• AA
• aa
• Aa
• AA or aa

Tags

NGSS.HS-LS3-1

How many individuals are there in the 3rd generation?

• 1

• 2

• 4

• 6

How many males are carriers?

• 2

• 3

• 4

• 5

Tags

NGSS.HS-LS3-3