Select the correct answerfrom the given option:
1. The chromosomes responsible for the determination of sex are called (CPMT 1992)
2. Genetic identity of a human male is determined by (CBSE PMT 1997; PB. PMT 1999; KCET 2000; CPMT 2000)
3. A family has five girls and n son. Probability of son as the 6th child will be (AFMC 1983, 1984, 2000; CPMT 2005)