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Principles of Inheritance and Variation question

2025 · Q65
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Principles of Inheritance and Variation question

2025 · Q65

NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1

With the help of given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in F3F_3F3​ generation.

NEET 2025 Biology - Principles of Inheritance and Variation Question 2 English

  1. A
    1/81 / 81/8
  2. B
    Zero
  3. C
    1/41 / 41/4
  4. D
    1/21 / 21/2
View written solutionFree

Correct answer: C

As in the $\mathrm{F}_1$ generation the carrier female and non-affected (normal, not carrier) had affected male child that means the genetic disorder is sex-linked recessive.

The consanguineous mating between female ( $X^c X$ ) and male ( $X^c Y$ )

NEET 2025 Biology - Principles of Inheritance and Variation Question 2 English Explanation

Out of 4 child only one is carrier i.e. $\frac{1}{4}$.

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