<Ul> <Li> Sexual intercourse </Li> <Li> Copulation </Li> <Li> Human reproduction </Li> </Ul> <Tr> <Th> Sexuality </Th> </Tr> <Tr> <Td> <Ul> <Li> Plant sexuality </Li> <Li> Animal sexuality </Li> <Li> Human sexuality <Ul> <Li> Mechanics </Li> <Li> Differentiation </Li> <Li> Activity </Li> </Ul> </Li> </Ul> </Td> </Tr> <Ul> <Li> Plant sexuality </Li> <Li> Animal sexuality </Li> <Li> Human sexuality <Ul> <Li> Mechanics </Li> <Li> Differentiation </Li> <Li> Activity </Li> </Ul> </Li> </Ul>

Which pair of chromosomes determine whether a child is male or female