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Q6 (CISF/2026) Science & Technology › Basic Science (Physics, Chemistry, Biology)

Which one of the following statements is the most appropriate with regards to the inheritance of traits in a normal human individual ?

Result
Your answer: —  Â·  Correct: C

Explanation

In humans, inheritance of traits follows the principles of Mendelian genetics. A normal human individual is a diploid organism, meaning they possess two sets of chromosomes. During sexual reproduction, the offspring receives one set of 23 chromosomes from the mother (maternal DNA) via the egg cell and another set of 23 chromosomes from the father (paternal DNA) via the sperm cell.

  • Both Paternal and Maternal DNA: Each gene for a specific trait has two copies (alleles), one inherited from each parent. Therefore, both parents contribute equally to the genetic makeup of the child for autosomal traits.
  • Options A and B: These are incorrect because they suggest that only one parent influences the traits, which contradicts the nature of biparental inheritance.
  • Option D: This is incorrect because, while mitochondrial DNA is inherited solely from the mother, the vast majority of phenotypic traits are determined by nuclear DNA, where both parents contribute equally.
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