Question

So, you think you have it hard doing your two hybrid crosses? Well, consider the case of Sylvia Plunkett. Sylvia was supposed to perform a reciprocal cross of two flies, one, homozygous for the "ns" mutation which results in nearsightedness and tends to make it difficult for them to get their drivers licenses, and flies homozygous for the "fb" mutation which results in a tremendous urge in males to spend Monday nights in a devotional adoration of 50 inch plasma screen TVs, Guinness and lamb vindaloo enchiladas with mango coconut chutney on the side (trust me, it may be gassy but it's really good.) Silvia had great difficulty with the cross of nearsighted females but managed to cross the nearsighted males with little difficulty. When she examined the F1 generation she found that all the males were flat on their backs in front of the TV burping up a storm. From this information fill in the diagram of the cross below. P1 P2 F1

Answer 1

or P nsns tbt b6 + x nstinst tb bb 아 Fi nsnst 66 x nonst fl + bb F2 66t nst tbt nst bb ns fbt nsbb nst b6 + Instast bit nostas the nestas bastas bb tbt bb bbt nst bb Instast bbt instastbe/nestas bet/rsnst bb bb bb se bb n866+ ne tns 664nstns tot nang buto ng ns fet hele 16+ H fbns Instns tbt ngtas to igns fb + nors fb fb bb t6 bb Chenotypie ratio normal nearsighted Ress: fb character nearsightedness & fb character ; :9:3:3:1