LADY CHESTY AQHA

[x factor fan]

The whole modifier thing was mentioned in passing, and not gone into in depth. But crossovers can be tricky.

Going back to Guaranteed Gold. He clearly has two of Milkies cream genes. Are the chromosomes completely identical ? Maybe, maybe not. What you can say is that the segment of the chromosome around the cream gene is likely to be identical. And how much of the chromosome is conserved would vary from quite a bit. I'd think this would make it very difficult to study in detail.

This whole duplicate chromosome modifier thing may be what is behind inbreeding depression. The greater percentage of identical chromosome bits, increases the chance of two modifiers matching up and being set to the minus condition.

My understanding of the work the Appaloosa Project folks are doing is that they are using pedigree and phenotype analysis to narrow down the places to look for the genes in question.

In my opinion, very nice work.