Related by context. Frequent words. (Click for all words.) 55 biological 50 recessive genes 49 grandparent visitation 49 asexual reproduction 48 stepparents 48 placental mammals 47 Mitochondrial DNA 47 biologically 47 evolutionarily 46 sentience 46 gamete 46 prairie voles 46 terminate parental 46 dyad 46 genetically identical 46 unmarried heterosexual 46 zygotes 45 photosynthetic organisms 45 stepparent 45 hermaphroditic 45 gut microbes 45 nonliving 45 irreducibly complex 45 Evolutionary biologists 45 biological molecules 45 sociality 45 nonmarital 45 evolutionary psychologists 45 paternal 45 Geobacter 45 terminating parental 45 polygyny 44 stepsiblings 44 heritable 44 adult adoptees 44 haploid 44 evolutionary origins 44 reproduce asexually 44 offspring 44 fossilization 44 intersexed 43 procreate 43 imprinted genes 43 abiotic 43 nonhuman animals 43 relatedness 43 femaleness 43 gametes 43 evolutionary 43 Marital status 43 firstborns 43 procreative 42 heterosexual couples 42 zygote 42 evolutionary adaptation 42 unalike 42 anonymous sperm donor 42 breadwinning 42 genetic 42 cohabitating 42 multicellular organisms 42 chromatin structure 42 methylation patterns 42 bipedalism 41 chirality 41 neurodevelopmental disorders 41 phyla 41 single celled organisms 41 prokaryotes 41 mimic estrogen 41 estrogen hormone 41 procreation 41 Nikki Araguz 41 nurturance 41 reproductively 41 genetically 41 born preterm 41 identical twins 41 heterosexual spouses 41 gut microbiota 41 symbiotically 41 asexual 41 Shewanella 41 macroevolution 41 familial 41 heredity 41 heterosexual marriages 41 ribonucleic acid RNA 41 unicellular 41 diploid 41 biosynthetic 40 eukaryotic cells 40 intestacy 40 single celled 40 parental 40 hunter gatherer societies 40 humans 40 centrosomes 40 endocrine disrupting 40 heterosexual 40 cohabiting