![]() But in this group polymorphism for super-numerary chromosomes and chromosome regions is very strongly developed in many species." "It is clear that the nature of natural populations is a very complicated subject, and it now appears probable that adaptation of the various genotypes to different ecological niches and frequency-dependent selection are at least as important, and probably more important in many cases, than simple heterosis (in the sense of increased viability or fecundity of the heterozygote)". This suggests, once again, that polymorphism is a common and important aspect of adaptive evolution in natural populations.Ī female (left) and a male (right) mallard ( A. Like many other species of birds, mallards display striking sexual dimorphism. Most eukaryotes species use sexual reproduction, the division into two sexes is a dimorphism. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |