Among 258 X chromosome-containing sperm , 19% had a repeat number equal to the donor's somatic DNA ( 47 repeats ) , 66% were expansions and 15% were contractions .
among 258 x chromosome-containing sperm , 19% had a repeat number equal to the donor's somatic dna ( 47 repeats ) , 66% were expansions and 15% were contractions .
O O B-cell_type I-cell_type B-cell_type O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O O O O O B-other_name O O O B-other_name O