Astudent studying the following pedigree states that person #9 is homozygous for a dominant trait. explain how she was able to determine this.. a)because both male and female members of this family display the trait. b) because this trait appeared in every generation of this family. c)because this person’s children, both male and female, all have the trait. d) because this person’s children all express the dominant trait even though her spouse is recessive for the trait.