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4.Principles of Inheritance and Variation
medium
A haemophilic woman marries a normal man, then
A
All the children will be normal
B
All the sons will be haemophilic
C
All the girls will be haemophilic
D
Half girls will be haemophilic
Solution
Haemophilia is a recessive $X$-linked disease. A female with defected single $X$-chromosome is normal but, carrier of disease, and male with defected single $X$-chromosome is haemophilic.
Standard 12
Biology
Similar Questions
Match the following – (w.r.t. Pedigree analysis)
| Column $-I$ | Column $-II$ |
| $a.$ Solid symbol | $(i)$ Carrier of sex linked trait |
| $b.$ Horizontal line between symbols | $(ii)$ Offspring |
| $c.$ Horizontal line above the symbols | $(iii)$ Trait to be studied |
| $d.$ Dot in centre | $(iv)$ Parents |
medium
