In humans, this sex chromosome is present only in males
In pigeons, the color and dilute genes are not only sex-linked, they are 
also... [DOC] [TLE] Basic Genetics > Genetics > HoG Handbook > Hemophilia of Georgia [PAR] Every human being starts as one cell, the cell formed when a woman's egg is 
fertilized by a ... One pair of chromosomes is different in men and women.