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Haemophilia and colour blindness are inherited as
Aautosomal dominant traits
Bautosomal recessive traits
CX-linked recessive traits
DY-linked traits
Answer & Solution
Correct answer: C. X-linked recessive traits
Both haemophilia and colour blindness are X-linked recessive. Males (one X) show the trait whenever they inherit the bad allele; females (two X's) need two copies and are usually only carriers. That's why these conditions appear far more often in boys.
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