Related by context. Frequent words. (Click for all words.) 67 sexual dimorphism 57 sociality 56 polygyny 56 asexual reproduction 55 zebra finch 54 methylation patterns 54 courtship rituals 54 phenotype 54 morphological 54 autistic traits 54 behaviourally 53 vocalisations 53 polyandry 53 behavioral traits 53 morphogenesis 52 reproductively 52 morphologically 52 phyla 52 reproduce asexually 52 hermaphrodites 52 relatedness 52 hunter gatherer societies 51 Xenopus 51 prepubertal 51 prokaryotes 51 females 51 asexuality 51 hermaphroditic 51 motile 51 melanogaster 51 cichlids 50 HLA genes 50 placental mammals 50 sex hormone estrogen 50 Physiologically 50 mammary tumors 50 crocodilians 50 habituation 50 pipefish 50 cortical thickness 50 Caenorhabditis elegans 50 fruit fly Drosophila 50 gut microbiota 50 taxa 50 Sexual intercourse 49 allelic 49 microbiota 49 histone modifications 49 phenotypic 49 evolutionarily conserved 49 spermatogenesis 49 osteoblast 49 major histocompatibility complex 49 intersexed 49 convergent evolution 49 evolutionary psychologists 49 macroevolution 49 mechanistically 49 FOXP2 49 gonad 49 receptor gene 49 developmental abnormalities 49 IGF1 49 zebra finches 49 stereotypic 49 morphology 49 involution 49 endocrine disruption 49 vertebrate animals 49 mammalian 49 heterosexual males 49 Supplementary Fig 49 Biology Letters 49 Th2 49 speciation 49 nonhuman primates 49 genetic variability 48 evolutionarily 48 subfamily 48 evolutionary origins 48 neuroendocrine 48 microRNA expression 48 Indohyus 48 mole rats 48 Evolutionary biologists 48 thyroid dysfunction 48 menarche 48 nematode worms 48 Ghrelin 48 HPA axis 48 Animal Behaviour 48 circadian clocks 48 reproductive hormones 48 lineages 48 gut microbes 48 germline 48 Inbreeding 48 genotypic 48 primate evolution 48 body fatness 48 Predation