Given what we know about genetics, we can confirm that the case described in the question will be a result of a De Novo mutation.
A De Novo mutation is referred to as the most severe mutation type. This is a mutation that occurs even before embryonic development has commenced. They are usually the result of mutations in the DNA of the germ cells before being fertilized.
These mutations are responsible for a variety of disabilities and can target a wide array of genes to cause these effects.
Hypomorphic Alleles
: A change that reduces, however, doesn't dispense with a gene's usefulness is hypomorphic. A progressively extreme condition, amorphic transformation, dispenses with the gene's capacity.
The great analyses characterizing hypomorphic alleles go back to the 1930s. Herman Miller, who won a Nobel Prize for finding that radioactivity causes changes, considered the eyeshade of organic product flies. These flies typically have red eyes, yet freak assortments can have white or apricot-hued eyes. The allele liable for various natural product fly-eye hues is known as the white allele, with the contraction "w."
