Related by context. Frequent words. (Click for all words.) 59 identical twins 53 fraternal twins 51 nonbiological 50 genetically identical 49 zygotes 49 amino acid sequences 49 recessive genes 48 diploid 48 heritable 47 prepubertal 47 offspring 47 alleles 46 placental mammals 46 probands 45 rhesus 45 Identical twins 45 genetically 44 genetically inherited 44 recessive gene 44 multivariate analyzes 44 gene expression profiles 44 twins 44 Mitochondrial DNA 44 firstborns 44 genetic makeup 43 traits 43 Ashkenazi Jews 43 heritability 43 gamete 43 phenotypes 43 personality traits 43 lineages 43 mtDNA 43 genetic traits 43 aneuploidy 43 offsprings 43 developmental abnormalities 43 cryptorchidism 43 fibroblast cells 43 phenotype 43 morphologies 43 maternally 42 ancestries 42 clades 42 relatedness 42 genotypic 42 haplotypes 42 mitochondrial DNA 42 heterozygous 42 neural tube defect 42 thymine 42 chromosomal abnormalities 42 morphologically 42 menarche 42 genes 42 atopy 42 gene expression patterns 42 sociality 42 imprinted genes 42 cohabited 42 CNVs 42 congenital abnormalities 42 mitochondrial genome 42 fraternal twin 42 phyla 42 genetic abnormalities 42 genetic abnormality 42 asexual reproduction 41 birthweight 41 gene variants 41 sexual dimorphism 41 identical triplets 41 genotyped 41 autosomal dominant 41 unexplained infertility 41 genetic 41 evolutionarily 41 identical twin 41 germline 41 genetic markers 41 concordance 41 difficulty conceiving 41 borns 41 BRCA2 mutations 41 species Homo sapiens 41 genetically engineered mouse 41 conceptions 41 polyandry 41 progenitors 41 human leukocyte antigen 41 behavioral traits 41 neoplastic 41 BRCA2 gene 41 univariate 40 incestuous relationships 40 stepfathers 40 mutant gene 40 chromosome abnormalities 40 chromosomes 40 heredity 40 anonymous sperm donor