Unit 8 Test Review - Genetics

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

Which of the following genotypes is homozygous recessive?

• A

• Aa

• AA

• aa

Which of the following represents the phenotype of Ttrr if tall is dominant over short and rough is dominant over wrinkled?

• heterozygous tall, homozygous wrinkled

• heterozygous short, homozygous wrinkled

• heterozygous short, homozygous round

• homozygous tall, homozygous wrinkled

The Punnett square above shows a cross between a homozygous dominant genotype for hair color and a heterozygous genotype for hair color. Which conclusion can be drawn for the square shown?

• The parents will have four offspring.

• Two of the offspring will be homozygous recessive.

• Only two fo the offspring will have the same hair color.

• All of the offspring will have the same color hair.

In cattle, the allele for short horns (S) is dominant over the allele for long horns (s). Two heterozygous short-horn cattle are bred and produced four offspring. What percentage would you expect to have long horns?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In cattle, the allele for short horns (S) is dominant over the allele for long horns (s). Two heterozygous short-horn cattle are bred and produced four offspring. What is the genotypic ratio of possible offspring?

• 1 ss: 1 Ss: 1 SS

• 75% short and 25% long horns

• 1 SS: 2 Ss: 1 ss

• 3:1 horns

What is the genotype for a pea plant homozygous for round seeds (R), and heterozygous for yellow seeds?

• RrYy

• RRyy

• RRYy

• rryy

What gamete possibilities could come from this parent's genotype? (Hint: FOIL)

• AB, AB, aB, aB

• Ab, AB, Ab, ab

• Ab, Ab, Ab, Ab

• AB, aB, ab, aB

What goes in box 3

• Aabb

• AABB

• AAbb

• aaBb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2