In man the mutation disease ‘Aniridia' $(Congenital\, absence \,of\, iris)$ occurs due to
Recessive mutation
Dominant mutation
Lethal mutation
All the above
It's Obvious
Fruit colour in squash is an example of
The recessive genes located on $X$-chromosome in humans are always
The defect sickle-cell anaemia is caused by the ______ of glutamic acid by valine at the $6^{th}$ position of the ______ globin chain of the haemoglobin molecule.
Mating among close relations is referred
In man, albinism is due to non-synthesis of melanin in the absence of
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