LBL3_2010 - Dominance,(~30min The purple flower allele in...

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Learn Before Lecture (LBL) 3 Worksheet:  Dominance, Alleles and Learn from Exam (~30 min) The purple flower allele in peas controls the phenotype since the heterozygote genotype makes a purple phenotype, indistinguishable from the dominant homozygote genotype. This is an example of complete dominance . However, not all alleles interact in such a straightforward manner. There are varying degrees of allele interaction and dominance relationships. Read pages 271-273, Examine Fig. 14.10 1. Color in Snapdragon flowers is determined by incomplete dominance. a. Incomplete dominance is defined as: b. The C W “white” allele codes for a mutant protein which cannot complete the formation of the red pigment in snapdragon flowers. Thus a C W C W snapdragon cannot make any red pigment. If a homozygous C R C R makes a “full” amount of red pigment, and a homozygous C W C W cannot make any, how much red pigment does a heterozygote (C R C W ) snapdragon make? c.
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This note was uploaded on 11/22/2010 for the course BIOLOGY SC Bio Sci 93 taught by Professor Dr.dianeo'dowdanddr.rahulwarrior during the Fall '10 term at UC Irvine.

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LBL3_2010 - Dominance,(~30min The purple flower allele in...

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