Every human trait is the result of mutations. In the early days of genetics, the Morgan fly lab at Columbia distinguished wild-type alleles from mutant alleles in a way that confused people's minds. Wild-type alleles were the common alleles. read more
Every human trait is the result of mutations. In the early days of genetics, the Morgan fly lab at Columbia distinguished wild-type alleles from mutant alleles in a way that confused people’s minds. read more
A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes. read more