IB35ACS Study Guide

8 of general pop smaller amygdala volume is associated

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 4% of all human genes o accounts for 10% of diseases we’ve recognized that have a mendalian pattern of inheritence o Pseudoautosomal region with the Y Chromosome Y Chromosome is much smaller X Chromosome evolutionary history: o evolved from a pair of autosomes 300 million years ago o major characteristics of our X chromosome today evolved before the radiation of mammals~105 million years ago The Y Chromosome o the gene coding portion of the X chromosome is 6 times longer than that of the Y Chromosome o has homologues for 54 of the 1098 genes on the x chromosome o Y essentially does not exchange with the X except for a small region o Y has gained some regions of its own o 15 genes on the Y chromosome have no detectable x chromosome homologue o considerable decay in the non recombining regions Chimpanzee versus human Y chromosome o the human Y chromosome has 54 functional genes that pair with a gene on the X chromosome ● ● ● ● ● ● ● o the chimpanzee has 5 of these 16 (inactivated) compared to the human Y chromosome How: polyandry versus polygny/ pair ponding Alfred Kinsey o 1948 sexual behavior of the human male o 1953 sexual behavior of the human female o Kinsey scale of sexual orientation o 0- maximally heterosexual, 6- maximally homosexual Evidence for a genetic contribution for homosexuality in humans o brothers of male homosexuals were 4 times as likely to be homosexual as well compared to controls o monozygotic twins are concordent for male homosexu...
View Full Document

This document was uploaded on 03/11/2014 for the course IB 35AC at Berkeley.

Ask a homework question - tutors are online