AP Biology chromosomal basis of inheritance

What type of cross is performed when an individual is showing a dominant phenotype and one wants to determine if the individual is homozygous dominant or heterozygous?

• a self cross

• a test cross

• a dihybrid cross

• an F1 cross

If two genes are located on different chromosomes thus, assort independently of each other, what phenotypic ratio should be expected of a dihybrid cross?

• 1:1:1:1 ratio

• 3:1 ratio

• 9:3:3:1 ratio

• 9:3:4 ratio

What type of gametes can the following genotype produce? BBTt

• BT, Tt

• Bb, Tt

• BT, Bt

• BT, bT, Bt, bt

Tags

NGSS.HS-LS3-2

Two individuals with the following genotypes are crossed BbRrgg x BbRrgg what are the chances of producing offspring that are homozygous recessive for all three traits?

• 1/8

• 1/64

• 1/16

• 1/2

Tags

NGSS.HS-LS3-3

Incomplete dominance produces heterozygotes with intermediate traits of the homozygotes. What phenotypic ratio would be expected if you crossed a homozygous dominant with a homozygous recessive?

• 1:0

• 1:1

• 3:1

• 1:2:1

Explain how a mother with blood type A and a father with blood type B can have a child with blood type O.

• The mother is I^AI^A and the father is I^BI^B

• The mother is I^Ai and the father is ii

• The mother is ii and the father is I^Bi

• The mother is I^Ai and the father is I^Bi

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The ability of a single gene to have multiple phenotypic effects

• incomplete dominance

• multiple alleles

• pleiotropy

• epistasis

The ABO blood group

• epistasis

• pleiotropy

• multiple alleles

• incomplete dominance

Tags

NGSS.HS-LS4-3

NGSS.HS-LS4-4

The phenotype of the heterozygote differs from the phenotypes of both homozygotes

• pleiotropy

• multiple alleles

• incomplete dominance

• epistasis

Is this pedigree dominant or recessive? How do you know?

• dominant because two unaffected parents have an affected child

• dominant because there is no indication that two unaffected parents have an affected child

• recessive because two unaffected parents have an affected child

• recessive because there is no indication that two unaffected parents have an affected child

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2