[SpaceAgeRobin] Re: Space Age Genetics

I worked out some results for crosses if appendage showed with 2 Sa genes

Sa-2 X Sa-0 = 1/6 appendage
Sa-2 X Sa-1 = 1/2 appendage
Sa-3 X Sa-0 = 1/2 appendage
Sa-3 X Sa-1 = 3/4 appendage
Sa-4  x Sa-0 = 100% appendage as would be X Sa-1

With this senario we would need an explination for SA X non-SA yielding no appendages  such as repressor gene

The ratios on this senario look to be too high for what we know  so partial domance works better with Sa-3 & Sa-4 showing beard with a  modifier for spoons and flounces, second gene or allele.

Chuck Chapman



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