The traits shown by an organism is it's phenotype.
- Qualititative differences fall into clearly distinguishable categories, with no intermediates. Discontinous variation (blood groups)
- Quantitative traits have no distinguishable categories but instead a range of values. Continous variation (height or mass)
In discontinous (qualitative):
- different alleles at a single gene locus have large effects
- different gene loci have different effects on…