Hemophilia is a sex-linked trait. If a man and a woman have a hemophilic son, which of the following MUST be true? a)The father is a carrier

b)The mother is a carrier

c)The boy's grandfather has hemophilia

d)Both parents have the disease allele

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna.b) they study alleles that contain genes, which are chromosomes.c) they study chromosomes that contain genes, which are dna segments.