BIO 2133 Chapter Notes - Chapter 7.3-7.5: Intersex, Gonadal Ridge, Interphase
4 Feb 2017
School
Department
Course
Professor
Document Summary
7. 3 the y chromosome determines maleness in humans. Normal = 23 pairs of human chromosomes. One pair varied in configuration between males and females. Male = one x and one y chromosome. Y chromosome sometimes plays no role in sex determinations presence of two. X could cause femaleness, or maleness could result in a lack of a second x. Short stature, cognitive impairment, skin folds on the back of the neck, underdeveloped breasts. Usually, the syndrome goes unnoticed (women are perfectly normal) In some cases, delayed development and retardation may occur. Possible correlation between this chromosome and criminal behavior piqued interest. Many xyy males are present in the population who do not exhibit antisocial behavior. High, but not constant, correlation between this karyotype and behavioral problems. Germ cells migrate to gonadal ridge tissue outer cortex (may develop into ovary) and inner medulla (may develop into a testis) are formed. The ducts differentiate into the reproductive tracts, either male or female.
