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NEETZoologyPrinciples of Inheritance and Variation

Read the following statements regarding inheritance patterns: (A) In incomplete dominance, the F₁ generation has a phenotype that does not resemble either of the two parents and is in between the two. (B) In co-dominance, the F₁ generation resembles both parents. (C) Polygenic inheritance occurs when a single trait is controlled by multiple alleles of a single gene. (D) Pleiotropy refers to a condition where multiple

Options

  1. AOnly one
  2. BOnly three
  3. CAll four
  4. DOnly two

Correct answer

D. Only two

Step-by-step solution

Statement (A) is correct as incomplete dominance results in an intermediate phenotype in the heterozygote. Statement (B) is correct as co-dominance involves the full expression of both alleles, making the F₁ resemble both parents. Statement (C) is incorrect because polygenic inheritance involves three or more distinct genes controlling a single trait, not multiple alleles of a single gene (which is multiple allelism). Statement (D) is incorrect because pleiotropy is the phenomenon where a single gene influences mul

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