alleryHaemophilia 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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