Genetics problem regarding linked genes

Question

hello! i would just want to ask, in a 3 linked genes what would be its resulting genotypic and phenotypic ratio?

B= body color (wildtype is brown, mutant is gray), W= wing size (wildtype is winged, mutant is wingless), A = antennae length (Wildtype is long, mutant is short) note: all wildtypes are dominant

lets say i cross "BBwwAA x bbWWAA" together in the parental generation and their resulting F1 is intercrossed which is BbWwAA x BbWwAA. What would be its genotypic and phenotypic ratio. in the simulation these are the obtained results 519 brown, winged, long antennae: 247 brown, wingless, long antennae: 229 gray, winged, long antennae: 5 gray, wingless, long antennae

Answer 1

Hi Airah,

Based on the information provided, it seems like this question assumes that the population is in Hardy-Weinberg equilibrium. Typically, when dealing with Mendelian genetics, it can be safely assumed that the population is in Hardy-Weinberg equilibrium.

The results based on the stimulation are sort of like the "actual results" and the results you obtain using the Hardy-Weinberg equation are like the "expected results".

The way you would interpret the F1 phenotype and genotype can be done by crossing (the box method) for each trait and then combining the 3 traits, or taking the cross product.

Your class instructor should have provided you with that information and skills.

If you would like help going through questions like these or need help with how to use those equations, please send a message and I'd love to help you further.

Best of luck!