Exam 2: Genes and Genetic Diseases

A normal male and a female carrier for red-green color blindness mate.Given that red-green color blindness is an X-linked recessive trait,what is the likelihood of their children being affected?

When homologous chromosomes fail to separate during meiosis,which of the following occurs?

A biologist is explaining how RNA directs the synthesis of protein.Which process is the biologist describing?

What is the diagnosis of a 13-year-old female who has a karyotype that reveals an absent homologous X chromosome with only a single X chromosome present? Her features include a short stature,widely spaced nipples,reduced carrying angle at the elbow,and sparse body hair.

A 50-year-old male was recently diagnosed with Huntington disease.Transmission of this disease is associated with:

A 20-year-old pregnant female gives birth to a stillborn child.Autopsy reveals that the fetus has 92 chromosomes.What term may be on the autopsy report to describe this condition?

Which of the following disorders is manifested primarily in males?

The nurse is teaching staff about the most common cause of Down syndrome.What is the nurse describing?

A 15-year-old female is diagnosed with Prader-Willi syndrome.This condition is an example of:

A child is born with blue eyes (bb).The child's mother has blue eyes and the father has brown eyes.Which of the following represents the father?

A patient wants to know the risk factors for Down syndrome.What is the nurse's best response?

A cell that does not contain a multiple of 23 chromosomes is called a _____ cell.

The base components of DNA are:

After a geneticist talks to the patient about being a chromosomal mosaic,the patient asks the nurse what that means.How should the nurse respond? You may _____ genetic disease(s).

Mutations that do not change the amino acid sequence and thus have no consequence are termed _____ mutations.