Genetics Quiz

Each DNA molecule may be called a

• chromatin strand

• chromosome

• gene

• Both A and B are correct.

Crossing over is the process during which

• similar gametes fuse together

• dissimilar gametes fuse together

• meiosis stops after meiosis I

• pairs of matching chromosomes line up along the equator of the cell and exchange genes with one another

If “A” stands for the dominant gene that prevents albinism and “a” stands for the recessive albinism trait, then an individual with the genotype of “aa” will express

• albinism and will be a carrier

• albinism and will not be a carrier

• normal pigmentation and will be a carrier

• normal pigmentation and will not be a carrier

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A DNA molecule is a

• gene

• chromosome

• genome

• gamete

Tags

NGSS.HS-LS1-1

The sickle cell/malaria relationship demonstrates the concept in medical genetics that “disease” genes

• are always codominant

• are never dominant

• often provide some biological advantage for a human population in certain circumstances

• never provide a biological advantage for human populations

Tags

NGSS.HS-LS4-2

If an individual has only an X chromosome (“XO”), then that person is genetically

• male

• female

• neither male nor female

• The condition of “XO” can never occur

Red-green color blindness shows X-linked recessive inheritance. Assume "X" is normal, "X1" is recessive for the trait, and "Y" is normal. Then, an individual with the genotype "XX1" will be a

• normal female and a carrier.

• color-blind male.

• normal female and not a carrier.

• normal male.

Tags

NGSS.HS-LS3-1

The condition called trisomy results from a(n)

• mistake in mitosis called nondisjunction.

• mistake in meiosis called nondisjunction.

• abnormality in a single gene.

• genetic predisposition.

Tags

NGSS.HS-LS3-2

Cystic fibrosis, caused by recessive genes in chromosome pair 7, results in the impairment of the

• chloride ion transport across cell membranes.

• sodium-potassium pump.

• calcium-storing capacity of the body.

• oxygen-carrying capacity of the blood.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS1-1

All of the following diseases demonstrate single-gene inheritance and are autosomal recessive except

• Tay-Sachs disease.

• total albinism.

• Huntington disease.

• severe combined immune deficiency (SCID).