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NEET 2012
Exam
NEET
Year
2012
Subject
Zoology
Chapter
Principles of Inheritance and Variation

NEET 2012 · Zoology · Principles of Inheritance and Variation

A normal-visioned man whose father was colour blind, marries a...

A normal-visioned man whose father was colour blind, marries a woman whose father was also colourblind. They have their first child as a daughter. What are the chances that this child would be colourblind?A normal-visioned man whose father was colour blind, marries a woman whose father was also colourblind. They have their

Options

  1. A100%100 \%
  2. B0%0 \%
  3. C25%25 \%
  4. D50%50 \%

Correct answer

B. 0%0 \%

Step-by-step solution

Colour blindness is an X-linked disease. So, woman whose father was colourblind will be carrier for the disease. A normal-visioned man whose father was colour blind, marries a woman whose father was also colourblind. They have their
So, possibility of a colourblind daughter (i.e., XcXcX^{\mathrm{c}} \mathrm{X}^{\mathrm{c}} in F1\mathrm{F}_1 generation is 0%0 \%.
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