13/10/2025
There is no 'leg-length-gene' so what about different leg lengths?!
This is Thaibo the long-legged Chabo because she does not carry the Cp (creeper) gene. Yet she has very short legs, even without Cp/cp+.
This shows that leg length is determined by the expression of multiple genes working together, rather than a single ‘leg-length-gene’.
Thaibo's leg genes are exactly the same as those of Modern English Games, whose legs are like stilts compared to Thaibo's short legs. With this example, I am trying to illustrate that each gene functions like a volume k**b ranging from 0 to 11, where 0 represents no expression (because the gene is methylated*), 1 indicates minimal expression, and 11 represents a maximum loud expression.
*) Methylation is a chemical modification that can effectively silence genes by adding methyl groups to DNA, preventing the gene from being read and expressed. This process acts as an ‘off switch’ without changing the underlying genetics (presence of the gene) itself. Through methylation, two chickens can possess identical genes yet display vastly different traits, because the genes are expressed at different levels, just like you can change the bass, mids and treble or EQ of your stereo or amplifyer.
It is certain that the same leg genes of the super long legs of the Modern English Game show a completely different pattern on the expression spectrum (or EQ) regarding how strongly specific genes are expressed, compared to a ‘long-legged’ Chabo.
Consider this now and then, because this principle applies not only to groups of genes working together, but also to individual genes such as those controlling mahogany, columbian, blue, or Db, amongst many others.
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