1. Synthesize Information How do you explain to the horse owner why this foal was
born with OLWS while two previous foals were perfectly healthy? What would you
tell the new parents of the baby girl about their prospects for having more
children?

The two previous horses were heterozygous recessive. They carried the genes for OWLs however the genes were recessive therefore the dominate gene gave it's phenotype. I would tell the horse owner that it would be best to breed using different horses, however breeding with the same horses may still lead to healthy results.

Explanation:

This answer revolves around Mendel and his studies. The parents had the gene coding for the disease however it was "out-shined" by the dominant gene, in this case the healthy gene. Therefore the two parents were healthy. Now according to Mendel's research and his punnet square (I suggest you look into it for further explanation) if two heterozygous recessive creatures were to have an offspring there is a high chance that one of their offspring will have the disease seeing as babies in general will receive an allele from the mother and one from the father. So a child having

maritime tropical may be your answer.