With Regard to the Estimation and Interpretation of the Recurrence

question 6

Multiple Choice

With regard to the estimation and interpretation of the recurrence of risks for genetic disorders,nurses should be aware that:

• A) with a dominant disorder, the likelihood of the second child also having the condition is 100%.
• B) an autosomal recessive disease carries a one in eight risk of the second child also having the disorder.
• C) disorders involving maternal ingestion of drugs carry a one in four chance of being repeated in the second child.
• D) the risk factor remains the same no matter how many affected children are already in the family.

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Definitions:

Hematocrit Test

A blood test that measures the proportion of red blood cells in the blood.

Erythrocytes

Red blood cells that carry oxygen from the lungs to the body's tissues and transfer carbon dioxide back to the lungs for expulsion.

Polycythemia

Polycythemia is a condition characterized by an increased number of red blood cells in the bloodstream.

Erythropoiesis

The production of red blood cells in the bone marrow.