Unit 5: Genetics - Mid-Unit Quiz (2/9/24)

Which diagram best represents the relative locations of the structures in the key below?

• 
• 
• 
• 

The processes of deletion, insertion, and substitution can alter genes in a skin cell. The altered genes will most likely be passed on to

• sperm cells
• egg cells
• every cell that develops from that skin cell
• only a few of the cells that develop from that skin cell

Chromosomes can be described as

• large molecules that have only one function
• coiled strands of genetic material
• folded chains of bonded glucose molecules
• reproductive cells composed of molecular bases

Which statement best describes the relationship between cells, DNA, and proteins?

• DNA is composed of proteins that carry coded information for how cells function.
• Cells contain DNA that controls the production of proteins.
• Proteins are used to produce cells that link amino acids together into DNA.
• Cells are linked together by proteins to make different kinds of DNA molecules.

The diagram below represents an incomplete section of a DNA molecule. The boxes represent unidentified bases. What will be the total number of bases represented by the letter A (both inside and outside the boxes) when the boxes are completely filled in?

• 1
• 2
• 3
• 4

Hereditary information is stored inside the

• nucleus, which has chromosomes that contain many genes
• ribosomes, which have chromosomes that contain many genes
• nucleus, which has genes that contain many chromosomes
• ribosomes, which have genes that contain many genes

 In cats, the gene for fur color has two alleles. The dominant allele (F) codes for gray fur and the recessive allele (f) codes for white fur. The female cat is  heterozygous. The male cat is homozygous recessive. What percentage of the cats will have white fur?

• 0%

• 25%

• 50%

• 75%

A baby is born with blue eyes (b) to a mother with brown eyes (B). Doctors tell her that the baby had a 50% chance of having this eye color. What are possible genotypes of both parents?

• Mom: Bb

  Dad: Bb

• Mom: BB

  Dad: Bb

• Mom: Bb

  Dad: bb

• Mom: bb

  Dad: bb

1. The molecule DNA contains the four bases listed below. 

A – adenine C – cytosine

G – guanine T – thymine

Which base pairings normally occur during DNA replication?

• Adenine pairs with thymine. Cytosine pairs with guanine.

• Guanine pairs with cytosine. Thymine pairs with thymine.

• Thymine pairs with guanine. Cytosine pairs with adenine.

• Cytosine pairs with cytosine. Thymine pairs with thymine.

A sample of DNA from a human skin cell contains 32% cytosine (C) bases. Approximately what percentage of the bases in this sample will be thymine (T)?

• 18

• 24

• 32

• 36