Mutation can result in several different types of change in sequences. Mutations in genes can either have no effect, alter the product of a gene, or prevent the gene from functioning properly or completely.Mutations can also occur in nongenic regions.n biology, a mutation is a permanent change of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
Achromatic means literally âwithout colorâ. It can also refer to: Achromatic colors, âgreysâ or âneutral colorsâ, also black. Achromatic lens, a lens designed to minimize chromatic aberration. Achromatic vision: Monochromacy (total color blindness) Achromatopsia. Monochrome.
The condition in which only one eye is aligned on the object of interest. The other eye may be directed too far inward (convergent strabismus), too far outward (divergent squint), or upward or downward (vertical squint). Squint in childhood, or any squint of recent onset, requires urgent treatment.