Coloured stuff

[belambi]

Somewhere, a while ago, there was a thread where we were discussing how cloned horses whilst genotypically identically are not necessarily phenotypically the same. We were discussing how it is highly possible how the environment etc may well influence colour..(taking the environment to mean anything from the immediate surrounds ie the womb, to diet weather area soil etc..)
here is an interesting link in relation to this..Notice how they all have white faces..(genotype) but they all look different shapes (phenotype)

http://www.nature.com/nbt/journal/v24/n6/fig_tab/nbt0606-605_F1.html

also.. some interesting comments towards the end of this link about argentine manchado

http://www.whitehorseproductions.com/ecg_basics4.html

[Molly Malone]

That's a great site. The Gulastra Plume is so pretty! And the manchado Arabian must have caused a stir wherever she went. I wonder if the pattern is there at birth or if it develops?

[JB]

Love love love the WHP site, have for a long time :) Yep, that Gulastra Plume is quite stunning!

Very cool pics of SLL's faces :lol: Great visual that shows that phenomenon.

[BravAddict]

Somewhere, a while ago, there was a thread where we were discussing how cloned horses whilst genotypically identically are not necessarily phenotypically the same. We were discussing how it is highly possible how the environment etc may well influence colour..(taking the environment to mean anything from the immediate surrounds ie the womb, to diet weather area soil etc..)
here is an interesting link in relation to this..Notice how they all have white faces..(genotype) but they all look different shapes (phenotype)

http://www.nature.com/nbt/journal/v24/n6/fig_tab/nbt0606-605_F1.html

also.. some interesting comments towards the end of this link about argentine manchado

http://www.whitehorseproductions.com/ecg_basics4.html

I have never heard of the soil, weather, diet, or the nature of the uterus itself affecting the phenotype of white markings in any animal. When people say "in the womb" I understand that to mean "during development."

I'll copy-paste what I wrote somewhere else...

A certain degree of the eventual amount of white, and its "design", is completely random. The development of an organism from single-celled to fully-formed is a process with many, many steps. Even beginning with identical genomes, as in clones and identical twins, the process is unlikely to occur the exact same way twice. A process with this element of randomness is called a stochastic process, and cell differentiation is, in part, a stochastic process.[26] The stochastic element of development is partly responsible for the eventual appearance of white on a horse, potentially accounting for nearly a quarter of the phenotype.[27] The research team that studied dominant white cited "subtle variations in the amount of residual KIT protein" as a potential cause for the variability in phenotype of horses with the same kind of dominant white.

Remember in Jurassic Park when the mathematician is flirting with the botantist, and he puts 2 drops of water on her hand? She expects them to roll down the same path, but the element of randomness makes the eventual path the drops of water take different.

OTOH, if someone has in the past few months come up with a study that suggests that things like diet affect white markings, I'm interested to see it!

[Mythology]

Very interesting- I've been looking for some clone pics showing different phenotypes- Thanks for the link!