Albinism is due to nonsynthesis of melanin on account of absence of
Albinism is a autosomal genetical recessive gene disorder. It occurs in homozygous recessive state. It is due X chromosome.The gene for albinism is a. it does not produce the enzyme tyrosinase, but is normal Allele A is does. Thus only homozygous individuals (aa) is affected. It is caused by the absence of the enzyme tyrosinase which is necessary for the synthesis of the pigment melanin. Due to this, skin and hair are light coloured.
So, the correct option is ‘tyrosinase’.