Genetics Quiz

Curly hair and the ability to taste the chemical PTC are inherited traits. Curly hair (H) is always dominant to straight hair (h). The ability to taste PTC (P) is always dominant to not being able to taste PTC (p). The alleles for straight hair and a non-taster for PTC are recessive. If both parents are heterozygous for both traits, what would be the genotype of an offspring with straight hair and the ability to taste PTC?

• HhPp

• Hhpp

• hhPp

• hhpp

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cystic fibrosis is an autosomal recessive disorder in humans. What is the probability that an offspring will have cystic fibrosis if both parents are carriers of cystic fibrosis?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Achondroplasia is an inherited condition that affects the formation of bone in humans. The allele for achondroplasia (A) is dominant to the unaffected allele (a). If a person who is homozygous dominant has children with a person who is homozygous recessive, what percentage of their children will likely have achondroplasia? Enter your answer in the box. Your answer must be a whole number.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

• 
• 
• 
• 

Tags

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?

• 
• 
• 
• 

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?

• 1/16

• 3/16

• 4/16

• 9/16

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait. Based on this pedigree, what are the most likely genotypes of individuals I-1 and I-2?

• I-1: aa, I-2: Aa

• I-1: AA, I-2: Aa

• I-1: Aa, I-2: aa

• I-1: aa, I-2: AA

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Mendel's law of segregation states that during meiosis, the alleles that control each trait separate, and only _________________ from each pair is/are passed to the offspring

• one allele
• the dominant trait
• two alleles
• the recessive trait

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2