Introduction to Genetic Analysis 186

Introduction to Genetic Analysis 186 - 6.4 Applications of...

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6 FROM GENE TO PHENOTYPE 185 KEY QUESTIONS How do individual genes exert their effect on an organism’s makeup? In the cell, do genes act directly or through some sort of gene product? What is the nature of gene products? What do gene products do? Is it correct to say that an allele of a gene determines a specific phenotype? In what way or ways do genes interact at the cellular level? How is it possible to dissect complex gene interaction using a mutational approach? OUTLINE 6.1 Genes and gene products 6.2 Interactions between the alleles of one gene 6.3 Interacting genes and proteins
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Unformatted text preview: 6.4 Applications of chi-square ( 2 ) test to gene interaction ratios The colors of peppers are determined by the interaction of several genes. An allele Y promotes early elimination of chlorophyll (a green pigment), whereas y does not. R determines red and r yellow carotenoid pigments. Alleles c1 and c2 of two different genes down-regulate the amounts of carotenoids, causing the lighter shades. Orange is down-regulated red. Brown is green plus red. Pale yellow is down-regulated yellow. [Anthony Grifths.] 44200_06_p185-226 3/1/04 3:15 PM Page 185...
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This note was uploaded on 01/10/2011 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.

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