Question

four sisters begin attending your school. one has brown hair and brown eyes. another has brown hair and blue eyes. the third also has blue eyes, but blonde hair. the fourth has blonde hair, too, but she has brown eyes. explain how the principle of independent segregation accounts for these sisters having four different phenotypes for two traits

Answer 1

Well, the parents have heterozygous for both traits. Which makes the alleles and genes segregate. 
Which results in recessive dominant, dominant recessive, and recessive recessive.

Hope this helps! (: