Related by context. Frequent words. (Click for all words.) 61 monozygotic twins 59 DRD4 59 Genetic variation 59 coevolution 58 prairie voles 58 MHC genes 57 #q# [001] 57 microRNA expression 56 transgenic mouse model 56 Chlamydia pneumoniae 56 genetic polymorphisms 56 methylation patterns 56 neuroimaging studies 56 neuroanatomical 56 MC1R 56 5 HTTLPR 56 etiologic 55 major histocompatibility complex 55 apoE 55 nicotinic receptor 55 amino acid sequences 55 serotonin transporter gene 55 COX2 55 gut microbiota 54 Morphological 54 receptor gene 54 phylogenetic analysis 54 adaptive immunity 54 chromosomal regions 54 Mammalian 54 COMT gene 54 Neuronal 54 APOE gene 54 Polymorphisms 54 transcriptional regulation 54 S. cerevisiae 54 homolog 54 differentially expressed genes 54 allelic 53 mice lacking 53 estrogen receptor alpha 53 Polymorphism 53 ApoE 53 HLA genes 53 symbiont 53 histone modifications 53 genotypic 53 simian immunodeficiency virus 53 KLF# 53 Chromosomal 53 RNA sequences 53 receptor tyrosine kinase 52 autosomal recessive 52 splice variants 52 zebra finch 52 heritable 52 susceptibility gene 52 rRNA 52 homologues 52 heterozygosity 52 genetically encoded 52 chromosomal DNA 52 rs# [002] 52 HGPS 52 proteomic analysis 52 Xenopus 52 CYP#C# [002] 52 serotonin transporter 52 homologs 52 International HapMap Project 51 genes encoding 51 nucleotide sequence 51 apoE4 51 glycosylated 51 Antigens 51 chromosome #p# [001] 51 hippocampal neurons 51 VKORC1 51 fig. S1 51 APOE4 51 C. pneumoniae 51 rDNA 51 CIB1 51 fruitflies 51 SORL1 51 Inactivation 51 Transcriptional 51 highly heritable 51 extraversion 51 phenotypes 51 cofactors 51 genetically engineered mouse 51 evolutionarily conserved 51 chromatin structure 51 Neu5Gc 51 autosomal 51 imprinted genes 51 somatic mutations 51 immunodeficiencies 51 breast cancer metastasis 51 clades