The ability of one person to produce over a million different antibody molecules does not require over a million different genes; rather, this wide range of antibody production is due to . The ability of one person to produce over a million different antibody molecules does not require over a million different genes; rather, this wide range of antibody production is due to . crossing over between the light and heavy chains of each antibody molecule during meiosis I alternative splicing of exons after transcription genetic DNA recombination rearrangements of cytosolic proteins in the thymus cells increased rate of mutation in the RNA molecules

The human somatic cell is made up of 46 chromosomes which are sub-divided into 22 pairs of autosomes and a pair of sex chromosomes (X and Y). An autosome is one of the numbered chromosome that is typically not a sex chromosome.

On the other hand, sex chromosomes (X and Y) are responsible for determining the gender or sex of living organisms such as humans.

Deoxyribonucleic acid (DNA) is an organic complex-molecular structure found in all living organisms. It comprises of genes and is essentially the foundation block of all living organisms such as humans, animals and plants.

DNA rearrangment can be defined as a process which typically involves re-writing the informations contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.

Hence, the ability of an individual to produce over a million different antibody molecules doesn't require the use of over a million different genes; rather, this wide range of antibody production is due to deoxyribonucleic acid (DNA) rearrangment.