Assertion: chromosome's cell | /r/MadeOf | an xy pair
Facets:
value: in butterflies
type: LOCATION
value: in birds
type: OTHER
value: in fishes
type: OTHER
value: in mammals (including man)
type: OTHER
Source sentences:
text: In mammals (including man) and flies, the cells of males contain an XY pair and the cells of females contain an XX pair.
text: On the other hand, in butterflies, fishes, and birds, the cells of females contain an XY pair and those of males contain an XX pair.