One Parent Has One Copy of a Dominant Allele for Gene

question 91

Multiple Choice

One parent has one copy of a dominant allele for gene 87 and one recessive allele for Gene 87.The other parent has two copies of the dominant allele for Gene 87.What is the chance that their children will inherit the recessive condition (two copies of Gene 87) ? You may need to draw a Punnett square to figure this out.

• A) 0%
• B) 25%
• C) 50%
• D) 75%
• E) 100%

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Definitions:

Ground Zero

Originally denoting the point on the earth's surface directly above or below an exploding nuclear bomb, now commonly used to refer to the site of the September 11, 2001 terrorist attacks on the World Trade Center in New York City.

Nuclear Explosion

A powerful detonation resulting from the release of energy following the fission or fusion of atomic nuclei, used in military weaponry and, experimentally, for peaceful purposes.

Los Alamos

A town in New Mexico, USA, known for the Los Alamos National Laboratory where the atomic bombs of World War II were developed, playing a significant role in nuclear research.

Sandy Surface

An area covered with or consisting of sand, often found in deserts, beaches, or as a soil composition.