Which of the following event distinguishes prophase-I of meiosis from prophase of mitosis?
a)	Nuclear membrane breaks down	b)	Chromosomes become visible
c)	Homologous chromosomes pair up	d)	Spindle forms

Prophase-I of Meiosis

Prophase of Mitosis

Prophase-I is very long and elaborate, comprising 5 sub-phases

Prophase chromosomes appear double from the very start

There is no pairing of homologous

Chromosomes, hence no chance of crossing over

Prophase is relatively very short and simple

Prophase-I chromosome do not look double in the beginning

Homologous chromosomes pair and often undergo crossing over in prophase-I