* Mitosis: This is the process of cell division that produces two identical daughter cells. Each daughter cell receives a complete copy of the parent cell's DNA. There is no genetic shuffling or recombination in mitosis.
* Meiosis: This is the process of cell division that produces gametes (sperm and egg cells). It involves two rounds of division, and during these rounds, crucial events occur that lead to genetic differences:
* Crossing over: Homologous chromosomes (one from each parent) exchange genetic material, resulting in new combinations of alleles.
* Independent assortment: Homologous chromosomes separate randomly, meaning each gamete receives a unique mix of chromosomes from the parent.
Therefore, mitosis produces genetically identical cells, while meiosis generates genetic diversity through crossing over and independent assortment.
Exceptions:
While mitosis usually produces identical cells, there are rare exceptions:
* Mutations: Mistakes can occur during DNA replication, leading to mutations. These mutations can be passed on to daughter cells during mitosis.
* Environmental factors: Environmental factors like exposure to radiation or certain chemicals can cause DNA damage, leading to mutations that can be inherited by daughter cells during mitosis.
However, these exceptions are less common and less significant in contributing to genetic differences between cells compared to the mechanisms of meiosis.
