The behaviour of chromosomes and genes can be compared with each other is best explained by which of the following statement?
(1) occur in nucleus
(2) both segregate at the time of gamete formation leading to transmittance of complete pair to a gamete.
(3) Independent pairs( gene) or pair of chromosomes segregate independently of each other or of other pair.
(4) The two alleles of a gene pair are located on homologous site on homologous chromosomes.