Along-distance runner wants to achieve his personal best time at the next cross country meet. what type of activity would be the most appropriate to focus on during training to accomplish this goal?

Marcus's genotype for eye color is bb. olivia has brown eyes, but she is heterozygous for the trait. what percentage of the children have blue eyes? if violet has green eyes and jonas has brown eyes, what is claudia's genotype? how many people in the family have blue eyes?