Biology
Grade-10
Easy
Question
When a mutation in one single gene causes a disease with a wide range of symptoms, this situation is known as:
Polygenic inheritance
Codominance
Incomplete dominance
Pleiotropy
Polygenic inheritance
Codominance
Incomplete dominance
Pleiotropy
Hint:
Pleiotropy
The correct answer is: Pleiotropy
Pleiotropy refers to the phenomenon of a single gene affecting multiple traits, and as that manifestly ambiguous definition reveals, pleiotropy is a single word with multiple meanings.
In genetics, Pleiotropy is defined as the expression of multiple traits by a single gene. Pleiotropy is derived from a Greek word meaning more ways. A simple example of a Pleiotropy is phenylketonuria is a disease. It is a genetic disorder caused by the low metabolism of the amino acid phenylalanine in the body cells.
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