Phenylketonuria is an inborn error of metabolism that is inherited as
Autosomal recessive trait
Sex-linked dominant trait
$X-$linked recessive trait
Autosomal dominant trait
A normal woman whose father was albino marries a man who is albino. What proportion of normal and albino can be expected among their offsprings
Single gene can exhibit multiple phenotypic expression, this is called.....
When two unrelated individuals or lines are crossed, the performance of $F_1$ hybrid is often superior to both its parents. This phenomenon is called
When a cross is made between offspring and its parents, it is known as
Continuous variations are attributed to