A sex ratio is the ratio of males to females in a population. As explained by Fisher's principle, for evolutionary reasons this is typically about 1:1 in species which reproduce sexually.Taray?c?n?z güncel de?il Modern web standartlar?n? desteklemedi?i yürekin videoteyp kontrol çk?z?l??maz. Taray?c?n?z? güncelleyebilir yahut elan modern farkl?