Posted by Kathleen Carson on December 19, 2002 at 20:55:19:
In Reply to: Re: Genetics of colour, dwarfism and polling posted by carol davidson on December 19, 2002 at 18:45:22:
Hi Carol, Yep understood that the Red is covering the Dun... my remarks are sometimes obtuse!
So basically what you are saying is that the Black gene must be present either single/Het or double/Hom for the Dun gene to work/express itself?
That is to say an animal which is genotype BB, Br BWr looks Dun when the D is present at the other loci. Whereas a rr, WrWr, Wrr simply looks red!?
What I was jabering about is that reciently I was talking to someone about this and I said that maybe the Dun factor was not able to work on the red and only the black...my thought were that it may be because these two coat colours are produced by different chemicals!
Is that the case?
Oh and how you get the email address is just by clicking on the name of the person. but anyway mine is m4m@austarnet.com.au
Before I go ...Murry Grey was a colour mutation in an Angus animal...which was used to start a new breed...anyway have looked up the reference and it is stated by Olson as being Incompletely Dominant =Ds..."The Australian MG appears to be homosygous for Ds acting upon a black backround. Red animals hom for Ds a light yellow and Black animals hom for Ds are light grey"
In actuality a Black which is homo for Ds is 'silver' and het is 'grey' and the Reds which are hetro look absolutely gorgous because they have a honey appearance in the Qld sunlight!
Kathleen