Multiple sex chromosomes in humans
How many chromosomes do people have? - Genetics Home Reference
Description: These species are still in an early phase of evolution with regard to their sex chromosomes. Total chromosome length is an estimate as well, based on the estimated size of unsequenced heterochromatin regions. Sexual differentiation humans Development of the reproductive system gonads Mesonephric duct Paramesonephric duct. A male is said to be hemizygous for genes on the X chromosome.