Two People (Both Heterozygotes)are Able to Taste a Chemical Substance

question 14

Multiple Choice

Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T) . The inability to taste PTC is caused by a recessive allele (t) . What proportion of their children would be expected NOT to be able to taste PTC?

• A)3/4
• B)All
• C)1/4
• D)2/3

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Definitions:

Electrode

A conductor through which electricity enters or leaves an object, substance, or region, used especially in energy storage and transfer.

Endosymbiotic Relationship

A symbiosis in which one organism lives inside the other, a relationship thought to have led to the evolution of eukaryotic cells.

Aerobic Bacterium

An aerobic bacterium is a type of bacteria that requires oxygen for its energy production and survival.

Circular Chromosome

A chromosome which forms a closed loop, found predominantly in bacteria and archaea.