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
Some individuals with blood group -$A$ may inherit the genes for blonde hair, while other individuals with blood group -$A$ may the gene for brown hair. This can be best explained by the principle of
Extranuclear inheritance is a consequence of presence of genes in
Mark the correct option (w.r.t. monosomy)
Haemophilia is a
Self sterility in "Nicotiana'' was reported by
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