Chapter 1 points out that a position on a chromosome is a gene locus, which simply means the location at which a gene is found. The set of alleles comprise an organism’s genotype, which might affect t...Chapter 1 points out that a position on a chromosome is a gene locus, which simply means the location at which a gene is found. The set of alleles comprise an organism’s genotype, which might affect the organism’s phenotype through the action of the genotype. Figure A1.1: Two chromosomes with the same gene but different alleles, A and a. (Image used with permission of www.genome.gov provided it includes the link http://xoax.net/mediaGallery/Allele-dat342)
