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NEET BIOLOGYEasy

Match the terms in Column-I with their description in Column-II and choose the correct option.

Column-I A. Dominance B. Codominance C. Pleiotropy D. Polygenic inheritance

Column-II

  1. Many genes govern a single character
  2. In a heterozygous organism, only one allele expresses itself
  3. In a heterozygous organism both alleles express themselves fully
  4. A single gene influences many characters
A

A-4, B-1, C-2, D-3

B

A-2, B-3, C-4, D-1

C

A-2, B-1, C-4, D-3

D

A-4, B-3, C-1, D-2

Step-by-Step Solution

  1. Dominance: In a heterozygous organism (dissimilar pair of factors), only one allele (the dominant one) expresses itself, while the other (recessive) is suppressed , .
  2. Codominance: In a heterozygous organism, both alleles express themselves fully (e.g., ABO blood groups where IA and IB both express) , .
  3. Pleiotropy: A single gene exhibits multiple phenotypic expressions (e.g., Phenylketonuria) .
  4. Polygenic inheritance: Traits are controlled by three or more genes (many genes govern a single character) .
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