Like film actors, film directors—David Fincher with House of Cards, Guillermo del Toro with The Strain—are crossing over into TV.
Few are willing to go on the record about their concerns with crossing over.
But a new study suggests that blood testing might be crossing over into mental-health territory.
crossing over cross·ing o·ver (krô'sĭng) or cross·ing-o·ver (krô'sĭng-ō'vər)
The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.