Pedigree Quiz

The pedigree below shows a family that expresses the dominant trait for dimples. Individuals with dimples are shaded in the pedigree.
What is the phenotype of the middle daughter in the pedigree?

• homozygous dominant

• does not have dimples

• heterozygous

• has dimples

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree below highlights a family with two parents who are carriers of a recessive trait.
Which is the genotype of the youngest daughter in the family?

• FF or Ff

• Ff or ff

• Ff

• ff

Tags

NGSS.HS-LS3-1

This pedigree shows the inheritance pattern for a recessive genetic disorder.
Why did the children in the second generation inherit the disorder?

• Both parents are carriers of the allele.

• The father is a carrier of the allele, but the mother is not.

• The mother is a carrier of the allele, but the father is not.

• Neither parent is a carrier of the allele, and the trait resulted from a random mutation.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The diagram below is a pedigree showing the inheritance pattern of a disease in a family.
What is the probability that one of the daughter′s children will have the disease if she has children with a male who is an unaffected carrier of the gene?

• 0%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

This pedigree shows the inheritance pattern of hitchhiker’s thumb.

Which is most likely the genotype of Erica and Rob for hitchhiker’s thumb?

• HH

• Hh

• hh

• h

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This pedigree shows the inheritance pattern within a family for a specific disease.

Which statement best proves the disease is recessive?

• Both first-generation parents have the disease.

• Neither first-generation parent has the disease.

• No third-generation offspring have the disease.

• All the second-generation offspring have the disease.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This diagram shows the expression of a trait in several generations of a family. Bob’s father does not carry an allele for sickle cell anemia, but his mother has sickle cell anemia. What is the probability that Bob could have sickle cell anemia?

• 100%

• 75%

• 50%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

This pedigree shows the inheritance pattern of hitchhiker’s thumb in several generations of a family.

Which statement provides the best evidence that hitchhiker’s thumb is a recessive trait?

• Jim’s cousins do not express the trait.

• Jim’s sister does not express the trait.

• Jim’s parents do not express the trait.

• Jim’s grandparents do not express the trait.

Tags

NGSS.HS-LS3-1

The diagram below shows a pedigree analysis for several generations of a family, in which several members are affected by an autosomal recessive genetic disorder. Which statement best explains how the parents in generation II (identified as 4 and 5) can be unaffected by a genetic disorder but have children in generation III (identified as 7 and 8) that are affected by the genetic disorder?

• The parents are both carriers.

• The children became carriers as they grew and developed.

• The children’s genotypes changed after they were born.

• The parents’ genotypes changed when they became older adults.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree below shows the inheritance pattern of hitchhiker’s thumb in a multigenerational family. How many people in this family have hitchhiker’s thumb?

• one

• two

• ten

• thirteen

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2