Auf ein Miniaturbild klicken, um zu Google Books zu gelangen.
Lädt ... Digit Ratio: A Pointer to Fertility, Behavior, and Health (A volume in the Rutgers Series in Human Evolution, edited by Robert Trivers.)von John T. Manning
Keine Lädt ...
Melde dich bei LibraryThing an um herauszufinden, ob du dieses Buch mögen würdest. Keine aktuelle Diskussion zu diesem Buch. keine Rezensionen | Rezension hinzufügen
Could the length of your fingers indicate a predisposition to breast cancer? Or musical genius? Or homosexuality? In Digit Ratio, John T. Manning posits that relative lengths of the second and fourth digits in humans (2D:4D ratio) does provide such a window into hormone- and sex-related traits. It has been known for more than a century that men and women tend to differ in the relative lengths of their index (2D) and ring (4D) fingers, which upon casual observation seem fairly symmetrical. Men on average have fourth digits longer than their second digits, while women typically have the opposite. Digit ratios are unique in that they are fixed before birth, while other sexually dimorphic variables are fixed after puberty, and the same genes that control for finger length also control the development of the sex organs. The 2D:4D ratio is the only prenatal sexually dimorphic trait that measurably explains conditions linking testosterone, estrogen, and human development; the study of the ratio broadens our view of human ability, talent, behavior, disposition, health, and fertility. In this book, Manning presents evidence for how 2D:4D correlates with traits ranging from sperm counts, family size, musical genius, and sporting prowess, to autism, depression, homosexuality, heart attacks, and breast cancer, traits that are all linked with early exposure to sex hormones. Keine Bibliotheksbeschreibungen gefunden. |
Aktuelle DiskussionenKeine
Google Books — Lädt ... GenresMelvil Decimal System (DDC)612.6Technology Medicine and health Human physiology Reproduction; Development; MaturationKlassifikation der Library of Congress [LCC] (USA)BewertungDurchschnitt:
Bist das du?Werde ein LibraryThing-Autor. |
Ch. 1: Males tend to have lower 2D:4D ratio (4th finger longer than 2nd) than women (caused by exposure to higher testosterone levels in utero).
Ch. 2: Lower 2D:4D in males = higher fertility; higher 2D:4D in women = higher fertility.
Ch. 5, 6: Lower 2D:4D in males = possibly higher rates of autism, heart disease.
Ch.7: Gay women tend to have lower 2D:4D relative to heterosexual women; correlations in homosexual males relative to straight males were less clear-cut.
ch.8: explores the effect on musical ability and musical appreciation.
ch.9: athletic stamina, spacial perception, and football ( )