How the chromosomal sex determines whether testes or ovaries will be formed?

The chromosomal sex, determined by the presence of either XX (female) or XY (male) chromosomes, plays a crucial role in the development of gonads. In individuals with XY chromosomes, the SRY gene on the Y chromosome triggers the formation of testes. Testes then produce testosterone and other hormones that promote male characteristics. Conversely, in individuals with XX chromosomes, the absence of the SRY gene leads to the development of ovaries.