In the nematode, Coenorhobditis elegans, there are two mutations, dumpy (dmp) an
ID: 312553 • Letter: I
Question
In the nematode, Coenorhobditis elegans, there are two mutations, dumpy (dmp) and uncoordinated (unc). These animals have two sexes, male and hermaphrodite. Hermaphrodites will reproduce by self-fertilization. A heterozygous hermaphrodite dmp^* dmp unc^* unc is allowed to self-fertilize and her offspring are examined. The data are shown in Table 1 Do these two genes appear to assort independently? Calculate a x^2 value to answer this question. Justify your answer. Assort independently (circle correct answer) Yes No Justification _______ ______ _____ ______Explanation / Answer
phenotype observed(O) expected(E) expected-observed (E-O ) (O-E)^2/E
864 864.54 0.54 0.27
339 339.21 0.21 0.11
311 311.19 0.19 0.09
86 86.05 0.05 0.02
=>1600 x^2=0.42
no the genes dont assortindependantly as expected alements are not in the ratio1:1:1:1 .In order to assort independently they shouldbe in the above ratio which doesnt really happen so they cannot be independant.
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