In guinea pigs, the gene for black coat color w dominates over the allele w, which causes white color.

In guinea pigs, the gene for black coat color w dominates over the allele w, which causes white color. the homozygous black animal was gnashing with the hotel white what offspring would be obtained from the backcrossing of the F gilts with the parent.

According to the introduced designations, we will write down the genotypes of the parent individuals.
A homozygous black animal will be WW, its body will produce W.
A homozygous white guinea pig will be ww, its germ cells will be w.
In F1 we ​​get Ww pups, which will have black hair and produce W and w germ cells.
1. if you cross the resulting guinea pig with the first of the above described parent individuals (WW), you get guinea pigs with black hair: WW and Ww;
2. if crossed with the second of the described parent individuals (ww), the offspring will look like this: 50% of the pups will have black hair (Ww); 50% – will have a white coat color (ww).