Administrator & LOTR Addict
Join Date: Apr 2000
Location: Bloomington, IN, USA
Re: understand the general genetics now. Inheritance
It is 50% from each, but the relationship of dominant to recessive genes will effect how the genes are expressed. Like in the easy case of color where a puppy that inherits the sable gene from say dad will be sable no matter what color mom was because sable is the dominant color. Or in the case of a black puppy it had to have inherited black from both parents because black is recessive.
There are also sex-linked genes. The best known is the gene for Hemophilia A which is found ONLY on the X (female) chromosome. Male dogs carry a Y and an X and the females two X. So, a male, XY, only needs one gene to have Hemophilia A AND can only pass the bad gene on to his daughters. A female would need two sets of chromosome with the bad gene to have the disease, but can pass it on to her daughters and her sons.
When breeding, how the genes match up is totally random for the most part. That is why puppies (or kids) are not identical. An animal that is very prepotent, one that consistently passes on desirable traits, generally will have more homozygous (two of the same) pairs of genes. For example a dog that is homozygous for sable will always produce sables. The other term is heterozygous (different genes).
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SG1 Deja IPO3 AWD1 KKL1 B/HOT, SG Elena IPO1 KKL CGC B/HOT, LB (the ugly little sable) IPO2 KKL B/HOT, Jarka (up and coming) BHOT, and gone but not forgotten, Vala SchH3 AWD1 FH2 CGC B/HOT, Donovan IPO1 TR2 AD, Nike SchH1 OB1 TR3 AD CGC HOT, Treue SchH3 CD CGC HOT