Unformatted text preview: http://homepage.usask.ca/~schmutz/Macintosh.jpg Inheritance Patterns Pt 2 Multiple genes 1 Last Time
Molecular basis of single gene phenotypes Dominance can be expressed in as a range, not an absolute Why are dominant disease alleles still around??? Environmental inﬂuences Genes with multiple alleles Traits inﬂuenced by sex Pleiotropy
2 Multiple gene inheritance patterns
Overview of gene interaction Epistasis - the masking effect Complementation - two genes, one phenotype Modifying genes - tweaking phenotypes Gene redundancy - the backup plan 3 Polygenic inheritance (‘many genes’)
Many genes contribute to a single phenotype Example: skin color or height
Gene 1 Gene 2 Gene 3 Phenotype...
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This note was uploaded on 03/29/2009 for the course BIO 325 taught by Professor Saxena during the Fall '08 term at University of Texas.
- Fall '08