GEN-3000 Study Guide - Midterm Guide: Monosomy, Hermaphrodite, Autosome
Document Summary
In 1981 henking found an x body but didn"t know what it was. They now know that there is something chromosomally different between males and females: also saw that x and y are separate in meiosis. More on chromosomal: xx xy = normal for all mammals, xx xo = the o does not represent a chromosome. It is just a placeholder to say that a chromosome is missing or nothing ii. 1. Heterogametic the sex that produces two different gametes (males) ii. 2. Homogametic the sex that produces two of the same gametes (females) ii. 3. Females (zw) are heterogametic (zz) while males are homogametic: haplodiploidy in bees iii. 1. Males develop from unfertilized eggs so they are haploid. Females develop from fertilized egg so they are. Environmental: weather (warm or cool) determines/controls sex, for the environmental sex determining system, genes in these organisms are triggered by something in the environment, sequential hermaphroditism in the slipper limpet iii. 1.
