title: A slippery boundary.
authors.affiliation: Molecular Biology and Genetics, 107 Biotech Building, Cornell University, Ithaca, NY 14853, USA. ac347@cornell.edu
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Clark
mesh_terms: D000818:Animals; D005075:Biological Evolution; D003434:Crossing Over, Genetic; D020224:Expressed Sequence Tags; D006801:Humans; D011110:Polymorphism, Genetic; D014960:X Chromosome; D014998:Y Chromosome