Scherzer has an uncommon condition called heterochromia iridis that affects less than 200,000 people in the United States. The condition, which in most cases doesn't damage the eyes, is caused by the distribution and levels of melanin in the irises
The parents alleles would be GG and gg. the reason why is if they were both GG they would all be GG. If they were both gg all the offspring would be gg. hope this helps.
