Do all the gametes formed from a parent organism have the same genetic composition (identical $DNA$ copies of the parental genome)? Analyse the situation with the background of gametogenesis and provide a suitable explanation.

(B) No,the gametes formed from a parent organism do not have the same genetic composition because they do not contain identical copies of $DNA$.
During the pachytene and diplotene stages of meiosis-$I$,crossing over and chiasma formation occur between homologous chromosomes.
The exchange of $DNA$ segments between non-sister chromatids of homologous chromosomes occurs in a random manner,resulting in new combinations of $DNA$ sequences.
Furthermore,the independent assortment of chromosomes during meiosis-$I$ ensures that each gamete receives a unique combination of maternal and paternal chromosomes.
Consequently,after the completion of meiotic division,the resulting gametes possess $DNA$ with varying degrees of genetic variation.