Related Experiment Video
Updated: Jul 31, 2026

Spectral Karyotyping to Study Chromosome Abnormalities in Humans and Mice with Polycystic Kidney Disease
Published on: February 3, 2012
[The clinico-biochemical characteristics of persons with paraphilias and a chromosome anomaly (47, XYY)]
Abstract:
The authors describe the results of a comprehensive examination of 5 persons with chromosomal aberration (47, XYY) manifesting the signs of deviation from normal sexual behavior. The examined were shown to have common dysontogenesis that manifested itself by retardation of the biological basis of sexuality, psychosexual formation together with retardation of the mental processes on the whole. Whatever variants of deviations from normal sexual behavior the common feature was predominance in the libido structure of sadistic aims, that contributed to the revealing of aggressive sexual behavior. Material changes were discovered by radioimmunoassay in the function of the hypothalamohypophyseal and gonadal system in persons with the "YY syndrome". The levels of prolactin and luteinizing hormone along with the LH/FSH ratio appeared significantly elevated. Disorders were also identified in the hypothalamohypophyseal and thyroid system. It is assumed that the discovered changes influence the serotoninergic mechanisms by which aggressive and pathological sexual behavior is formed in such persons.
Related Concept Videos
Pedigree Analysis
Karyotyping
Sex-linked Disorders
Nondisjunction
X and Y Chromosomes
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
The Y Chromosome Determines Maleness
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...

