Answer:d. There is no prophase during mitosis
Explanation:.during the prophase 1 of meiosis,the chromatins shortens to become chromosomes.these chromosomes double themselves and then pair up as homologous chromosomes,one from each parents.each one is called a bivalent.each bivalent is joined together at the centromere and forms a chromatid.
Sister chromatids pair up and join in points called chiasmata.
Two sets of chromatids forms the tetrads and exchange genes.this process is called crossing over.
It is absent in mitosis.
In meiosis, crossing over causes variations in offsprings
