Hasta dónde podrá llegar el tema del "género"
Definición de "macho" (male) en "MedicineNet":
Male: The sex that produces spermatozoa.
www.medicinenet.com/male/definition.htm
Definición de "hembra" (female) en "MedicineNet":
Female: The traditional definition of female was "an individual of the sex that bears young" or "that produces ova or eggs". However, things are not so simple today. Female can be defined by physical appearance, by chromosome constitution (see Female chromosome complement), or by gender identification. Female chromosome complement: The large majority of females have a 46, XX chromosome complement (46 chromosomes including two X chromosomes). A minority of females have other chromosome constitutions such as 45,X (45 chromosomes including only one X chromosome) and 47,XXX (47 chromosomes including three X chromosomes).
www.medicinenet.com/female/definition.htm
