Question

A _____ is a section of a chromosome that codes for a trait. The specific combination of alleles an organism has is called its ______ which affect(s) the organism's______?

Answer 1

Allele. An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. ... An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene.