This process is known as serial dilution
Answer:
1.) heterozygous 2.) hairy 3.) hh 4.) heterozygous 5.) no fur | as for 5, 6, and 7 i need more information because you can't see the guinea pig. number 6 could either be "HH" or "hh" depending on what it looks like, since it's heterozygous. The punnet square on the bottom right goes as follows, (from left to right) HH, Hh, hH, hh.
The presence of intros and repetitive sequences is a major contributor, as are the differences in the number of genes.