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NEETZoologyPrinciples of Inheritance and Variation

Trait/Disorder Type of Inheritance A. ABO blood group 1. Multiple alleles B. Human skin color 2. Polygenic inheritance C. Sickle-cell anemia 3. Pleiotropy D. Height in humans 4. Codominance

Options

  1. AA - 1, B - 2, C - 3, D - 2
  2. BA - 2, B - 4, C - 1, D - 3
  3. CA - 3, B - 1, C - 4, D - 2
  4. DA - 4, B - 3, C - 2, D - 1

Correct answer

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

Step-by-step solution

ABO blood group: Multiple alleles (IA, IB, and i alleles). Human skin color: Polygenic inheritance (influenced by multiple genes). Sickle-cell anemia: Pleiotropy (a single gene affects multiple traits, such as anemia, pain, and organ damage). Height in humans: Polygenic inheritance (influenced by multiple genes leading to continuous variation in height).

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