What is a Major Difference Between Mitosis and Meiosis I

Question

What is a major difference between mitosis and meiosis I in a diploid organism?
A)Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I.
B)Crossing over occurs in mitosis but not in meiosis I.
C)DNA replication takes place prior to mitosis, but not before meiosis I.
D)Only meiosis I results in daughter cells that contain identical genetic information.
E)There are two divisions in meiosis I but only 1 in mitosis.

Accepted Answer

The major difference between mitosis and meiosis I in a diploid organism is that in mitosis, sister chromatids separate, leading to identical daughter cells, while in meiosis I, homologous pairs of chromosomes separate, leading to daughter cells with different genetic information. This is due to crossing over and independent assortment during meiosis I. Additionally, there is only one division in mitosis, while there are two divisions in meiosis I. DNA replication occurs before both mitosis and meiosis I.