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Many characteristics can be broadly classified as qualitatively inherited or quantitatively inherited. The table below summarizes the main differences between these two classifications.

Qualitatively inherited Quantitatively inherited
Controlled largely by one gene locus (or maybe two loci) Controlled by many gene loci
Phenotypes can be described by a small number of distinct categories or classes Phenotypes show continuous distribution
Routine environmental influences (such as nutrition, climatic conditions, etc.) do not alter phenotypes Routine environmental influences (such as nutrition, climatic conditions, etc.) alter phenotypes to varying degrees

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For the characters below, choose if qualitative inheritance or quantitative inheritance is a more likely descriptor.

Mature skeletal size is
Select Option qualitativelyquantitatively
inherited. Polydactyly (possessing extra fingers/toes or not) is
Select Option qualitativelyquantitatively
inherited. Litter size in mice and pigs is
Select Option qualitativelyquantitatively
inherited. Likelihood to develop heart disease is
Select Option qualitativelyquantitatively
inherited. Black vs. chocolate coat color in labrador retriever dogs is
Select Option qualitativelyquantitatively
inherited.
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