Exam 48: Genetics and Heredity

The function of DNA is to transcribe the genetic code to tRNA.

A group of symptoms called Down syndrome results from trisomy:

Xeroderma pigmentosum is a genetic disease that affects the ability to form pigments in the eye, leading to color blindness.

Genes are segments of DNA molecules.

All female gametes carry the X chromosome.

The process of mitosis in humans produces gametes that contain only 23 chromosomes.

There is no such thing as a heterozygous color-blind female.

Which of the following conditions does not occur as a result of nondisjunction?

The sickle cell/malaria relationship demonstrates the concept in medical genetics that "disease" genes:

Which is a simple cartoon of a chromosome used to show the overall physical structure of a chromosome?

Match each of the terms with its corresponding definition. -Genotype with two identical genes for a single trait

Tay-Sachs disease is a dominant condition involving failure to make a lipid-producing enzyme.

After age 35, a mother's chances of producing a trisomic child increase dramatically.

Fetal alcohol syndrome can be classified as both a congenital and genetic disorder.

When DNA is in its chromosomal form, it is non-functional.

One specific transcribed mRNA strand will always produce the same polypeptide.

A female who is red-green color blind must be heterozygous for the condition.

Gene linkage decreases the likelihood of genetic variation among the offspring of a single set of parents.

Osteogenesis imperfecta is a recessive disorder of connective tissues.

What is meant when a trait is classified as sex-linked? Give an example of such a trait.