Answer:
(See Attached Punnet Sq)
Explanation:
There are two genes here represented different alleles (Yy & Ss). According to Mendelian law, the principle of independent assortment applies to mean each allele has equal chances of ending up in a gamete. Therefore each gamete can have either allele of the two genes as shown in the punnet square. The combinations of the offspring are therefore numerous.
Xenografts are tissue grafts harvested from a different animal species.
I'm not sure what you're asking, but if you're looking for a word to describe this change its "mutation"