Normal testicular development requires which of the following chromosomes

The Y chromosome is one of two sex-determining chromosomes (allosomes) in mammals, including humans (the other is the X chromosome). In mammals, the Y-chromosome contains the gene SRY, which triggers testicle development if present. The human Y chromosome is composed of about 50 million base pairs. DNA in the Y chromosome is passed from father to son, and Y-DNA analysis may thus be used in genealogical research.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-419