ACP Review Day 5 6F- Genetics

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait. Using “A” for the dominant allele and “a” for the recessive allele, enter your answer in the boxes that follow for the most likely genotypes of individuals I-1 for the pedigree above.

• aa

• Aa

• AA

• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait. Using “A” for the dominant allele and “a” for the recessive allele, enter your answer in the boxes that follow for the most likely genotypes of individuals I-2 for the pedigree above.

• aa

• Aa

• AA

• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The four butterflies in the illustrations represent the offspring in the F1 generation. Which statement is best supported by the phenotypes of these offspring?

• The F1 generation is composed only of males.

• Two of the offspring in the F1  generation will not be able to reproduce.

• The F1  generation is the result of a dihybrid cross.

• Two of the offspring in the F1 generation will experience a spontaneous mutation.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In Holstein cattle the allele for black hair color (B) is dominant over the allele for red hair color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having horns (p).

 

What is the expected phenotypic ratio of the offspring of a BbPp × BbPp cross if these alleles sort independently?

• 16 black/polled : 0 black/horned : 0 red/polled : 0 red/horned

• 12 black/polled : 0 black/horned : 0 red/polled : 4 red/horned

• 4 black/polled : 4 black/horned : 4 red/polled : 4 red/horned

• 9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned

A model of the genetic control of coat color in rabbits is shown. Which Punnett square represents a cross that would produce albino offspring?

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

In domesticated dogs, hair type is controlled by two different alleles. The allele for wire hair is (H) and the allele for smooth hair is (h). When two heterozygous dogs are crossed, what percentage of the offspring is expected to be homozygous for smooth hair?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A genetic cross involving two unlinked genes is represented.

AaGG x aaGg

Which genotype is NOT possible in the offspring produced by the cross?

• AaGG

• Aagg

• aaGg

• aaGG

Some angelfish colors are determined by codominance. Possible phenotypes and genotypes of angelfish colors are shown. Which table shows the expected phenotypes of offspring resulting from a cross between a black angelfish and a black-lace angelfish?

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Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Mice have two unlinked allele pairs that affect fur color. The table shows how allele pairs affect fur color. The term “agouti” describes fur with pigmentation that changes in each hair from the shaft to the tip, giving the fur a banded appearance. Mice with the aa allele pair are albino, regardless of the second allele-pair combination. What is the probability of albinism in the offspring of a cross between two mice with AaBb alleles?

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Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans blood type is determined by the A, B, and O alleles. The A and B alleles are codominant to each other and dominant over the O allele. An individual with the AO genotype and an individual with the BO genotype can produce offspring with which of the following phenotypes?

• O only

• A or B only

• A, B, or O only

• A, B, AB, or O

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2