Hypomorphic describes a mutation that causes a partial loss of gene function. A hypomorph is a reduction in gene function through reduced (protein, RNA) expression or reduced functional performance, but not a complete loss. The phenotype of a hypomorph is more severe in trans to a deletion allele than when homozygous.

What is a Hypermorphic gene?

Definition. (genetics) A type of mutation wherein the change in gene leads to an increase in normal (wild-type) gene function. Supplement. The effects of mutations in organisms vary.

What is an Amorph genetics?

An amorph is a mutated allele that has lost the ability of the parent allele (whether wild type or any other type) to encode any functional protein. An amorph mutation is the loss of genetic information for the synthesis of appropriate mRNA.