00290nam a2200121 a 450000500170000008200150001710000180003224500190005026000370006930000240010649000200013050000180015020251203091559.0  a576.5bJAG  aJagjit, Singh  aGenetics today  aDelhibNational Book Trustc1988  ax, 30p.c22 cm.bHB  aPopular science  aInclude index