Inheritance

Coat color in a dog breed is determined by incomplete dominance where three colors are produced (Brown, tan and white), and the brown coat allele (B) has incomplete dominance over the white coat allele (b). Which offspring ratio would be expected from a cross between a brown dog and a white dog?

• A. 2 BB: 2 Bb

• B. 4 Bb

• C. 1 BB: 2 Bb: 1 bb

• D. 2 BB: 2 bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A cross between a red flower and a white flower produces red and white spotted flowers. Which type of inheritance pattern is indicated by these results?

• A. polygenic

• B. codominance

• C. multiple alleles

• D. incomplete dominance

Human blood type is determined by multiple alleles (A, B, and O). A and B are both dominant to O. Which ratio would result from a cross between a man with Type AB blood and a woman with Type O blood?

• A. 50% Type A, 50% Type O

• B. 75% Type A, 25% Type B

• C. 50% Type A, 50% Type B

• D. 100% Type O

The Punnett square above illustrates a dihybrid cross for cats. The traits are long tail (s), short tail (S), brown hair (B), and white hair (b). What are the genotypes of the parents that produces the probabilities shown in the Punnett square above?

• A. Ssbb x ssBb

• B. Ssbb x SSBB

• C. SsBb x SsBb

• D. SSBb x SsBb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A woman develops skin cancer after prolonged exposure to ultraviolet radiation from sun tanning. Would her future children be at risk of inheriting this skin cancer?

• A. Yes, if she had a baby after developing skin cancer.

• B. Yes, this is a mutation in the DNA of her somatic cells.

• C. No, this condition does not affect the woman's egg cells.

• D. No, babies cannot get skin cancer because they are immune.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Which principle best explains why the gametes only each contain a single allele?

• A. Mendel's Law of Dominance states that dominant alleles must separate from recessive alleles in gamete formation.

• B. Mendel's Law of Inheritance states that only one allele is inherited from each parent and the dominant allele is inherited first.

• C. Mendel's Law of Segregation states that alleles must segregate during gamete formation in order to create haploid sex cells need for reproduction.

• D. Mendel's Law of Independent Assortment states that each trait is inherited separately and the resulting gametes each only contain the DNA for a single trait.

A gene that affects hair length in dogs has two alleles. The allele for short hair (L) is dominant to the allele for long hair (l). A cross of heterozygous two short-haired dogs produces six short-haired and two long-haired offspring. Which of the following best explains how the long-hair phenotype can appear in the offspring of two short-haired dogs?

• A. Only recessive alleles are inherited from homozygous parents.

• B. Dominant alleles grow weaker as they are passed from parents to offspring.

• C. Only the parent with a dominant allele can pass that allele to offspring in sexual reproduction.

• D. A heterozygous parent has an equal chance of passing either the dominant allele or the recessive allele to offspring.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans having two eye brows is a completely dominant trait, the recessive trait is expressed as having a single connected eyebrow. If a two parents who are heterozygous for the eyebrow trait had an offspring what is the probability that their child would express the recessive phenotype?

• A. Their offspring has a 0% chance of expressing the recessive phenotype.

• B. Their offspring has a 25% chance of expressing the recessive phenotype.

• C. Their offspring has a 75% chance of expressing the recessive phenotype.

• D. Their offspring has a 100% chance of expressing the recessive phenotype.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What percentage of the offspring will have this recessive disease?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

I have 1 X chromosome and 1 Y chromosome. What am I?

• Male
• Female