Genetics Quiz Review

What does the genotype for a trait BB represent?

• Each letter represents the dominant allele inherited from each parent.

• Both letters represent the dominant allele inherited from the mother.

• Both letters represent the recessive allele inherited from the father.

• Each letter represents the recessive allele inherited from each parent.

Tags

NGSS.HS-LS3-1

Brown fur (B) is dominant to white fur (b) in rabbits. Which genotype would result from two parents that are homozygous for brown fur?

• BB

• Bb

• b

• B

Tags

NGSS.HS-LS3-1

In guinea pigs, an allele for rough fur (R) is dominant over an allele for smooth fur (r), and an allele for black coat (B) is dominant over an allele for white fur (b). What would be the genotype of a guinea pig with smooth black fur?

• RR, BB

• Rr, Bb

• rr, bb

• rr, BB

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The table lists the characteristics of a pea plant and its offspring.

Which statement is true about the characteristics of the pea plant?

• The allele r is dominant over allele R.

• The allele a is dominant over allele A.

• Both the alleles R and A are dominant in nature.

• Both the alleles R and a are dominant in nature.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How is it possible for an organism to have a recessive phenotype for a trait such as white flowers in pea plants?

• The organism inherits the recessive allele from one parent.

• The organism inherits the recessive allele from both parents.

• The organism fails to inherit the alleles for the trait from either parent.

• The organism acquires the trait from the environment.

Tags

NGSS.HS-LS3-1

What does it mean if a trait is dominant?

• If the trait is present, then the trait is always expressed.

• If the trait is present, then the trait is never expressed.

• If the trait is absent, then the organism will not survive.

• If the trait is absent, then the organism will survive.

Tags

NGSS.HS-LS3-1

Huntington’s disease is a dominant trait that affects brain cells. A student studies a pedigree chart showing the passage of the disease in a family. Huntington’s disease is a dominant trait that affects brain cells. A student studies a pedigree chart showing the passage of the disease in a family.

• All the female members of the family are homozygous recessive and have two recessive alleles, one obtained from each parent.

• All unaffected members of the family are homozygous recessive and have two recessive alleles, one obtained from each parent.

• All the affected members of the family are homozygous dominant and have two dominant alleles, both obtained from one parent.

• All the male members of the family are heterozygous and have one dominant and one recessive allele, both obtained from one parent.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The trait for dark-colored hair is dominant over the trait for light-colored hair in mice. Which statement correctly represents an example of a phenotype and a genotype for these traits?

• Genotypes dd and Dd result in the light-colored hair phenotype.

• Genotypes dd and DD result in the dark-colored hair phenotype.

• Genotypes Dd and DD result in the dark-colored hair phenotype.

• Genotypes DD and dd result in the light-colored hair phenotype.

Tags

NGSS.HS-LS3-2

The diagram shows the inheritance of a recessive disorder.

Which statement describes the ability of the children passing a recessive gene to their offspring?

• One child can pass the recessive gene to their offspring, and three children cannot.

• Two children can pass the recessive gene to their offspring, and two children cannot.

• Three children can pass the recessive gene to their offspring, and one child cannot.

• Four children can pass the recessive gene to their offspring, and zero children cannot.

Tags

NGSS.HS-LS3-1

In a certain species of mouse, coat color is determined by a single gene. The alleles for coat color are B, which codes for brown fur, and b, which codes for white fur.

If a mouse displays the dominant trait for coat color, what would be its phenotype?

BbBb

• Bb

• bb

• brown

• white