BIO 30_Exam 3_Lec 11 A

How genetic and environmental factors influence the inhertiance and expression of quantitative traits

• Quantitative Genetics
• Qualitative Genetics
• Pseudo-Quasi Genetics
• None of the Above

Controlled by 1-2 genes with less environmental influence

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

phenotypic classes are easily recognizable

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

characters are observed by visual inspection (color, pod texture)

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

controlled by many genes with great environmental influence

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

classes are not easily recognizable

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

characters are in measurable units (plant height, leaf shape, weight)

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

Show discontinuous variation (can just be 2 blocks when tabulated)

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

shows continuous variation (may appear as bell shaped or two mounts far from e/o)

• Qualitative Characters
• Quantitative Characters
• Pseudo-Quasi Characters
• None of the Above

Yule 1906

• continuous variation is due to multiple genes
• every gene has a small effect on the character
• discontinuous variation is due to multiple gene
• studied grain color in wheat
• proposed the term polygenes