Morgan’s test-cross analysis of genetic linkage between autosomal genes

(b) Single crossover during female meiosis leads to parental and recombinant gametes at frequencies specified by recombination or by chance, and gamete union produces test-cross progeny(b) Single crossover during female meiosis leads to parental and recombinant gametes at frequencies specified by recombination or by chance, and gamete union produces test-cross progeny

F Full-wing, red-eye Vestigial-wing, purple-eye females test-cross males vg pr vg pr Gamete V vg pr formation vg pr F2 Female gametes Male gametes Observed m Expected frequency vg pr frequency vg+ prt 2 0.4465 n m Fullwing 0. 5 Parentals V9 pr 0 893/" o 4465 m Purple eye 0 25 ' m Vestigialwing ' vg pr + V9 Pr vg pr 00535 - IV. E Purple eye 0'25 m Full wing vg pr Recombinants 10.7% vg pr* 0.0535 n 1 .0000 as Vestigial wing vg pr