A Study of the Heredity of Human Twinning ...Leland Stanford junior university., 1934 - Twins |
Common terms and phrases
average deviation basis of chance births per family blastomeres brothers causation of dizygotic chorion conceptuses Curtius definitive ovum dermal ridges dichorionic different expressions dizy dizygotic twins Doctor of Philosophy empirical percentages existence expected family lines fertilization fetal membranes frequency of monozygotic frequency of twinning genotype hereditary factor heredity involved heredity of human human twinning investigators large number like-sexed pairs male monochorionic monozygotic and dizygotic monozygotic twins mothers of monozygotic multiple births number and percentage number of births obtained occurrence of twinning pairs of twins parents of dizygotic parents of monozygotic percentage of twin-producers percentage of twins placentae possible produce twins propositus recessive factor resemblance second polar body secondary oocyte sex-limited trait sibs sisters small number third type Total births twin pair twinning parents twinning tendency twinning were determined twins as twin-producers twins Percentage type of heredity types of twins unlike-sexed Weinberg zygotic ན ན ན ས ས ས