A scientist discovers a DNA-based test for one allele of a particular gene. This and only this allele, if homozygous, produces an effect that results in death at or about the time of birth. Of the following, which is the best use of this discovery?
A) Screen all newborns of an at-risk population.
B) Design a test for identifying heterozygous carriers of the allele.
C) Introduce a normal allele into deficient newborns.
D) Follow the segregation of the allele during meiosis.
E) Test school-age children for the disorder.

Question

Quizplus · Accepted Answer

Designing a test for identifying heterozygous carriers of the allele is the best use of this discovery because it allows for the identification of individuals who carry one copy of the allele (are heterozygous) and therefore have a risk of passing the allele to their offspring. This information can be crucial for genetic counseling and making informed reproductive choices, especially since the homozygous condition is lethal.

A Scientist Discovers a DNA-Based Test for One Allele of a Particular