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4.Principles of Inheritance and Variation
medium
Given is : $X$ is the chromosome with gene for haemophilia and $X$ is the chromosome with normal gene. Which of the following individuals will act as carrier for haemophilia
A
$X^hY$
B
$X Y$
C
$X^hX^h$
D
$X^hX$
Solution
(d)When both the chromosomes bear genes for disease i.e. in homozygous condition, only then the character will be expressed otherwise the individual will act as a carrier.
Standard 12
Biology