... and Segregation. In 1890 it was observed that all but one pair of chromosomes in an organism were the same. These chromosomes were called autosomes. The remaining pair was called sex chromosomes called X and Y chromosomes. The male gamete called the sperm will either contain an X or Y chromosome that will combine with the X chromosome to make either a male (XY) or female (XX ... ) zygote. Just like autosomes, the sex chromosome X carries dominant and recessive genes that will determine portions of the offspring's phenotype. The outcome of the genes that are located on the X-chromosome fo...

• Word Count: 665
• Approx Pages: 3
• Grade Level: Undergraduate