In Drosophila, yellow bodies (y ) and white eyes (w ) are bo…

In Drosophila, yellow bodies (y ) and white eyes (w ) are both caused by recessive X-linked alleles. The normal alleles (y+ amd w+ ) cause tan bodies and red eyes, respectively. A y w female is mated to a y+ w+ male and the F1 progeny are allowed to mate with each other. Two hundred F2 were observed and they are: 55 y w; 45 y w+; 45 y+ w; 55 y+ w+.  What is the chi-square value for the test for goodness of fit of the null hypothesis of no linkage? (Recall that the chi-square statistic is the sum, for all classes, of (O-E)2/E.)

Sally’s adjusted gross income is $38,000. She owns a home an…

Sally’s adjusted gross income is $38,000. She owns a home and has mortgage interest expense of $9500, charitable contributions of $1500, property tax of $7,000 and interest on her car loan of $2,100. This year she also had medical expenses of $2,000. She is allowed a standard deduction of $12,000. What is Sally’s taxable income?