No! obviously not!
well i don't know what your saying,i said the collie gene is still there but dormant, you where saying
it could virtually disappear in one generation.now i don't know what your saying
I'll explain in simple terms. All genes are in pairs, each pair made up of one from each parent. there is a pair of genes to control just about every aspect , eye colour , coat type , coat colour etc. some genes are dominant to others . If you take the genes for eye colour in humans for example, the brown gene is dominant to blue, therefore with a blue gene from one parent and brown gene from the other parent, all offspring will have brown eyes. Now these offspring will have one blue gene and one brown. Two parents of this type will produce offspring that can have two brown genes, two blue genes or one of each. Now the ones with the two brown genes have lost the blue gene in one generation. Back to the dogs in question having 75% greyhound genes on both sides, it's easy to see that these genes passed at random to make up pairs can throw pups with very few collie genes. Add to that, that some of the collie genes past may well be recessive genes . Hence some of the pups could be virtually greyhounds.