Unit 5 Sect. 1 & 2 Exam

A _______ _______ is an abnormal condition that a person inherits through genes or chromosomes.

What are the two ways that genetic disorders can be caused?

A genetic disorder in which the body produces abnormally thick mucus in the lungs and intestines.

• down syndrome

• sickle-cell disease

• cystic fibrosis

• hemophilia

How is cystic fibrosis caused? What occurred to cause this to happen?

A genetic disorder that causes the red blood cells of people with the disease to have an unusual sickle shape.

• sickle-cell disease

• hemophilia

• down syndrome

• cystic fibrosis

Sickle-cell disease affects __________, a protein in red blood cells that carries oxygen.

How can a person get sickle-cell disease?

A genetic disorder in which a person's blood clots very slowly or not at all.

• cystic fibrosis

• sickle-cell disease

• hemophilia

• down syndrome

Hemophilia is caused by a ________ allele on the X chromosome.

Because hemophilia is a sex-linked disorder, it occurs more frequently in males than females.

• true

• false