the interchange of sections between pairing homologous chromosomes during the prophase of meiosis
traveling across
(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other
a shallow area in a stream that can be forded
a junction where one street or road crosses another
a voyage across a body of water (usually across the Atlantic Ocean)
having come or been brought to a conclusion
