Good Point, In principle the X chromosome already has this issue when you get it from your farther, if the A chromosome is simply a normal X chromosome with an insertion of a set of proteins that blocks silencing, then you can still have recombination, if we assume the Amazon proteins are all located in the same LD region then mechanically everything is as in the post, but we do not have the Muller’s ratchet problem
Also the A only recombines with X as AY is female and therefore never mates with an AX or AY
Wouldn’t this prevent the A chromosome from having recombination with other A chromosomes? Which seems like a problem due to Muller’s ratchet.
Good Point, In principle the X chromosome already has this issue when you get it from your farther, if the A chromosome is simply a normal X chromosome with an insertion of a set of proteins that blocks silencing, then you can still have recombination, if we assume the Amazon proteins are all located in the same LD region then mechanically everything is as in the post, but we do not have the Muller’s ratchet problem
Also the A only recombines with X as AY is female and therefore never mates with an AX or AY