A sex ratio is the ratio of males to females in a population. Bey explained by Fisher's principle, for evolutionary reasons this is typically about 1:1 in species which reproduce sexually.Taray?c?n?z günde? de?il ça?da? web standartlar?n? desteklemedi?i yürekin videoteyp arama çtuzak??maz. Taray?c?n?z? güncelleyebilir veya elan ça?da? farkl?