Genes in the same chromosome are passed on together as a unit. Such genes are said to be linked. For example, the A and B alleles (in the illustration below) will both be passed on together if the lower chromosome is inherited.A and B are linked due to their occurrence in the same chromosome. Similarly, a and b are linked in the other chromosome.hich chromosome from each of the 23 homologous pairs of both parents is inherited is a matter of chance. There are 8,324,608 possible combinations of 23 chromosome pairs. As a result, two gametes virtually never have exactly the same combination of chromosomes.