DEUA 2 Review

Which of the following is a component of a nucleotide?

• Phosphate group

• Lipid

• Protein

• Carbohydrate

In a monohybrid cross, what is the expected phenotypic ratio of the offspring from two heterozygous parents?

• 1:1

• 3:1

• 9:3:3:1

• 1:2:1

Explain the concept of incomplete dominance using a flower color example.

• Red and white flowers produce red flowers.

• Red and white flowers produce pink flowers.

• Red and white flowers produce white flowers.

• Red and white flowers produce red and white striped flowers.

Explain the process of segregation of alleles during meiosis.

• Alleles are duplicated and passed on to offspring.

• Alleles are randomly distributed to gametes.

• Alleles are exchanged between homologous chromosomes.

• Alleles are combined to form new traits.

Tags

NGSS.HS-LS3-2

What is the structure of DNA described as?

• Single helix

• Double helix

• Triple helix

• Quadruple helix

Tags

NGSS.HS-LS1-1

Which base pairs with adenine in DNA?

• Cytosine

• Guanine

• Thymine

• Uracil

What is the significance of crossing over during meiosis?

• It increases the number of chromosomes.

• It decreases genetic variation.

• It increases genetic variation.

• It ensures identical daughter cells.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-3

Explain the concept of a dihybrid cross.

• A cross involving one trait.

• A cross involving two traits.

• A cross involving three traits.

• A cross involving four traits.

What is the expected phenotypic ratio in a dihybrid cross between two heterozygous individuals?

• 1:1

• 3:1

• 9:3:3:1

• 1:2:1

Which of the following is a result of a gene mutation?

• Increased genetic diversity

• Decreased genetic diversity

• No change in genetic diversity

• Uniform genetic traits

Tags

NGSS.HS-LS3-2