Complex Patterns of Inheritance

A trait that is located on the X chromosome is called

• Multiple alleles

• Codominance

• Polygenic Inheritance

• X-linked traits

Tags

NGSS.HS-LS3-1

A trait that is controlled by more than one gene is called

• Polygenic Inheritance

• Multiple alleles

• Incomplete dominance

• Codominance

Tags

NGSS.HS-LS3-1

A trait in which a third phenotype appears that is always a blend of the parental phenotypes is called

• Polygenic Inheritance

• Multiple alleles

• Incomplete dominance

• Codominance

A trait in which a third phenotype appears which includes both parental phenotypes (neither is lost) is called

• Polygenic Inheritance

• Multiple alleles

• Incomplete dominance

• Codominance

A trait that has more than two alleles available per gene is called

• Polygenic Inheritance

• Multiple alleles

• Incomplete dominance

• Codominance

Disorder: Colorblindness (X-linked)

Alleles: X^B, X^b

Dominant form of trait (B): Normal vision (not colorblind)

Recessive form of trait (b): person is colorblind

What is the genotype of a female carrier of this disorder?

• X^BX^B

• X^BX^b

• X^bX^b

• X^b Y

Tags

NGSS.HS-LS3-1

Disorder: Colorblindness (X-linked)

Alleles: X^B, X^b

Dominant form of trait (B): Normal vision (not colorblind)

Recessive form of trait (b): person is colorblind

What is the genotype of a colorblind female?

• X^BX^B

• X^BX^b

• X^bX^b

• X^bY

Tags

NGSS.HS-LS3-1

Disorder: Colorblindness (X-linked)

Alleles: X^B, X^b

Dominant form of trait (B): Normal vision (not colorblind)

Recessive form of trait (b): person is colorblind

What is the genotype of a colorblind male?

• X^BX^B

• X^BY

• X^bX^b

• X^bY

Tags

NGSS.HS-LS3-1

Disorder: Colorblindness (X-linked)

Alleles: X^B, X^b

Dominant form of trait (B): Normal vision (not colorblind)

Recessive form of trait (b): person is colorblind

Complete a Punnett square showing the cross of a heterozygous (carrier) female and a colorblind male. Which percentage of children would be predicted to be colorblind?

• 25%

• 50%

• 0%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Disorder: Hemophilia (X-linked)

Alleles: X^H, X^h

Dominant form of trait (H): Normal

Recessive form of trait (h): person has hemophilia

A phenotypically normal woman has phenotypically normal parents. However, she has a hemophilic brother. What are her chances of being a carrier for hemophilia?

• 0%

• 100%

• 75%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3