Question

Choose the correct answer from the alternatives given.
Match column I with column II and select the correct option from the given codes.

	Column I		Column II
A.	A single trait controlled by three or more than three alleles	(i)	Pleiotropy
B.	A single trait controlled by three or more than three genes	(ii)	Multiple alleles
C.	A single gene exhibits multiple phenotypic expression	(iii)	Polygenic inheritance

• A. A-(ii), B-(iii), C-(i)
• B. A-(iii), B-(ii), C-(i)
• C. A-(i), B-(ii), C-(iii)
• D. A-(ii), B-(i), C-(iii)

Answer 1

The correct option is A A-(ii), B-(iii), C-(i)

• Multiple alleles is a type of non-mendelian inheritance pattern that involves more than just the typical two alleles that usually code for a certain characteristic in a species.
• Polygenic inheritance occurs when one character is controlled by two or more genes. Often the genes are large in quantity but small in effect. Examples of human polygenic inheritance are height, skin color, eye color, and weight.
• Pleiotropy occurs when one gene influences two or more seemingly unrelated phenotypic traits. For example, phenylketonuria is a disease caused by pleiotropy. Sickle cell anemia is also a disease caused by pleiotropy.

So, the correct option is 'A-(ii), B-(iii), C-(i)'.