The basic concepts of medical genetics.
D000015:Abnormalities, Multiple / Q000235:genetics; D002869:Chromosome Aberrations; D000013:Congenital Abnormalities / Q000235:genetics*; D004314:Down Syndrome / Q000235:genetics; D005808:Genes, Recessive; D005817:Genetic Counseling; D006801:Humans; D007621:Karyotyping