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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 or give a suitable explanation.
Answers (1)
Post meiosis, gamete formation takes place. Crossing overtakes place during the pachytene stage of Prophase I in meiosis. During crossing over, non-sister chromatids combine leading to recombination of various genes.
The daughter cells produced after meiosis; thus, have slightly different genotype compared to the mother cell. Variations in subsequent generations become possible because of crossing over. Minor variations over thousands of generations allow for evolution to take place.
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