FINAL EXAMS REVIEW

In pea plants, tall (T) is dominant to short (t). If a heterozygous tall plant is crossed with a short plant, what percentage of the offspring will be tall?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In guinea pigs, black fur (B) is dominant to white fur (b). If two heterozygous black guinea pigs are crossed, what fraction of their offspring will have white fur?

• 1/4

• 1/2

• 3/4

• 1/8

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In humans, brown eyes (B) are dominant over blue eyes (b). If a blue-eyed man marries a heterozygous brown-eyed woman, what is the probability that their first child will have blue eyes?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In fruit flies, red eyes (R) are dominant to white eyes (r). If a red-eyed female heterozygous for eye color is crossed with a white-eyed male, what is the expected phenotypic ratio of their offspring?

• 1 red-eyed : 1 white-eyed

• 3 red-eyed : 1 white-eyed

• 1 red-eyed : 3 white-eyed

• All red-eyed

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In mice, black fur (B) is dominant to brown fur (b). If a homozygous black mouse is crossed with a brown mouse, what proportion of their offspring will be brown?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In snapdragons, red flowers (R) are incompletely dominant to white flowers (r), and heterozygous plants have pink flowers. What will be the phenotypic ratio of offspring from a cross between two pink-flowered plants?

• 1 red : 2 pink : 1 white

• 1 red : 1 pink : 2 white

• 3 red : 1 white

• 1 pink : 1 white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In snapdragons, flower color exhibits incomplete dominance. If a red flower (RR) is crossed with a pink flower (Rr), what proportion of the offspring will be pink?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A woman with blood type A (genotype AO) marries a man with blood type B (genotype BO). What are the possible blood types of their children?

• A, B, AB, O

• A, B, AB

• A, O

• B, O

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following statements is true about co-dominance pattern of inheritance?

• both alleles are recessive

• both alleles will be expressed

• the alleles will mix and form a new phenotype

• the alleles are neither dominant nor recessive

Colorblindness is a genetic disorder that follows an X-linked pattern of inheritance which is more common in males. What must be the genotypes of the parents for a female to have this disorder?

• X^RX^r and X^rY

• X^RX^r and X^RY

• X^RX^R and X^rY^r

• X^RX^R and X^RY^r

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2