42Chapter 2 •Patterns of Inheritance2.Now that the above results have “passed” thechi-square test because p±0.05, it does not meanthat the hypothesis is true, merely that the results arecompatible with that hypothesis. However, if we hadobtained a pvalue of , 0.05, we would have beenforced to reject the hypothesis. Science is all aboutfalsiFable hypotheses, not “truth.”3.We must be careful about the wording of thehypothesis, because often there are tacit assumptionsburied within it. The present hypothesis is a case inpoint; if we were to carefully state it, we would haveto say it is that the “individual under test is aheterozygote A/aand the A/aand a/aprogeny are ofequal viability.” We will investigate allele effects onviability in Chapter 6, but for the time being we mustkeep them in mind as a possible complicationbecause differences in survival would affect the sizesof the various classes. The problem is that if we rejecta hypothesis that has hidden components, we do notknow which of the components we are rejecting.
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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.