Slide 2 How sexual differences are created (Sex is determined by the sperm of the male) Female xx Male x x xx Female Fetus Sperm xy Ovum x y xy Male Fetus Source: CENWOR: Beyond the Glass Ceiling, 2008 Explanation: Sexual difference is a common factor which is universal, unchangeable, not self-determined, devoid of differences such as human race, ethnicity, nationality or class. 21