While the maternally derived X chromosome was preferentially active in the asymptomatic twin , the paternal X chromosome was active in the other , affected twin and was found in her hemizygotic nephew .
while the maternally derived x chromosome was preferentially active in the asymptomatic twin , the paternal x chromosome was active in the other , affected twin and was found in her hemizygotic nephew .
O O B-DNA_molecule I-DNA_molecule B-DNA_molecule I-DNA_molecule O O O O O B-multi_cell I-multi_cell O O B-DNA_molecule B-DNA_molecule I-DNA_molecule O O O O O O O O O O O O O B-multi_cell I-multi_cell O