25 ! this pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. based on the information in the chart, which of the following statements is true about individuals 3 and 4? select one: a. at least one is heterozygous for the trait. b. they are both homozygous dominant for the trait. c. they are both heterozygous for the trait. d. at least one is homozygous for the trait.