Genetics Unit Review Part 2: 7.L.2.2

The diagram shows a Punnett Square for a cross between two parents with the genotypes Bb and bb.

If brown hair (B) is dominant to blond hair (b), what is the probability of these parents having a child with blond hair?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

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The Punnett Square shows phenotypes and genotypes for a cross between two parent plants.

Why will all of the F1 generation be tall?

• Both alleles for plant height are dominant

• Both alleles for plant height are recessive

• The allele for tall height is dominant, while the allele for short height is recessive.

• The allele for tall height is recessive, while the allele for short height is dominant.

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NGSS.HS-LS3-1

The pedigree shows the inheritance pattern of hitchhiker's thumb in a multigenerational family.

How many people in this family have hitchhiker's thumb?

• one

• two

• ten

• thirteen

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The diagram is a pedigree showing the inheritance pattern of a disease in a family.

What is the probability that one of the daughter's children will have the disease if she has children with a male who is an unaffected carrier of the gene?

• 0%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The diagram shows a Punnett Square.

Which genotype belongs in the missing square?

• Tt

• TT

• tt

• TtT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The Punnett Square shows a cross between two individuals who are heterozygous for a trait, where the A allele is dominant over the a allele.

What percentage of the offspring will most likely express only the recessive allele?

• 75%

• 50%

• 25%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The diagram shows the offspring of a parental cross for a specific trait.

What can be predicted about the parents' genotypes?

• Both parents are heterozygous for the trait.

• Both parents are homozygous recessive for the trait.

• One parent is homozygous dominant for the trait and one parent is heterozygous for the trait.

• One parent is homozygous recessive for the trait and one parent is heterozygous for the trait

Tags

NGSS.HS-LS3-1

The diagram shows the crossing of a father, with almond-shaped eyes, with a mother, who also has almond shaped eyes.

If almond-shaped eyes is a dominant trait, which are the most likely genotypes of the parents?

• father: AA

  mother: AA

• father: AA

  Mother: Aa

• father: AA

  mother: aa

• father: aa

  mother: aa

Tags

NGSS.HS-LS3-1

If a genetic disorder is recessive, how do offspring develop the disorder?

• They inherit a faulty gene from one parent.

• They inherit a faulty gene from each parent.

• Their genes are affected by the environment.

• Their genes mutate in response to their parents' genes.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Janie has cystic fibrosis, which is an autosomal recessive disease. Which situation best explains why she has the disease?

• She received two recessive alleles from her father.

• She received two recessive alleles from her mother.

• She received one recessive allele from her father and one recessive allele from her mother.

• She was exposed to a chemical that caused a mutation in her genes after birth.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2