Heredity & Genetics (SC.7.L.16.2)

In white-tailed deer, the gene for brown fur with white spots is dominant over the gene for completely dark-brown fur. A buck and a doe that both have brown fur with white spots mate. The doe gives birth to a fawn with completely dark brown fur. What is the chance that the next fawn will have brown fur with white spots?

• 25%

• 50%

• 75%

• 100%

Mariana's mother is pregnant, and Mariana wants to know if her future sibling's eyes will be blue since Mariana's eyes are blue. The trait for blue eyes is carried on a recessive allele, and Mariana's dad has brown eyes, while her mother has blue eyes. Using a Punnett Square, which ratio shows the probability that Mariana's future sibling will have a heterozygous genotype for brown eyes?

• 1:4

• 1:2

• 1:3

• 3:4

A scientist studying pea plants determines that the allele for yellow seed color (Y) is dominant to the allele for green seed color (y). To study this further, the scientist decided to cross two heterozygous pea plant that produce yellow seeds. Using a Punnett Square, what is the percent probability of these two pea plants producing offspring that make yellow seeds?

• 25%

• 50%

• 75%

• 100%

A scientist studying pea plants determines that the allele for yellow seed color (Y) is dominant to the allele for green seed color (y). To study this further, the scientist decided to cross two heterozygous pea plant that produce yellow seeds. Using a Punnett Square, what is the percent probability of these two pea plants producing offspring that make green seeds?

• 0%

• 25%

• 50%

• 75%

The pedigree shows the phenotypes for hair color of individuals in a family over four generations. In this pedigree, light hair color is a recessive allele, and dark hair color is a dominant allele. Use the pedigree to answer any questions that follow.

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Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cara has two pea plants. One has green flowers, and one has yellow flowers. She decides to breed the pea plants to learn about genetics. Cara knows that the flower color of pea plants is determined by a pattern of simple dominance. The diagram above shows the color of individuals produced over three generations when Cara started breeding the pea plants. Assuming that both parents were homozygous, which of the following best explains why the "f1" generation only had yellow flowers?

• All members of the "f1" generation were homozygous recessive.

• Yellow flowers are dominant over green flowers.

• Both parents passed on yellow genes.

• There was a genetic mutation.

Polydactyly is an inherited condition common in cats. It causes cats to grow extra digits, or toes, on their paws. It is dominant over the characteristic to grow the normal number of digits. If a male cat that is heterozygous for polydactyly (Pp) mates with a female that is homozygous for polydactyly (PP), what are the possible genotypes of their first generation of offspring?

• PP and pp only

• Pp and PP only

• PP, Pp, and pp

• Pp only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Delray has dimples and his wife does not. Delray has a homozygous dominant genotype for dimples, and his wife has a homozygous recessive genotype for no dimples. If Delray and his wife decide to have children, then which Punnett Square correctly shows the probability of them having a child with dimples?

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• 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Albino animals do not have pigment in their fur or eyes. Their eyes are pink, and their fur is pure white. The gene for albinism is recessive. An albino gorilla breeds with a gorilla that has pigment and produces an albino gorilla offspring. What are the odds that, if they reproduce again, they would produce another albino gorilla?

• 25%

• 50%

• 75%

• 100%

The pedigree above shows the phenotypes for hair color of individuals in a family over four generations. In this pedigree, light hair color is a recessive allele, and dark hair color is a dominant allele. What is the probability that offspring Y will have the light hair phenotype?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.MS-LS4-4