2. Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events? Name the structures formed at the end of these two events.
Differences between microsporogenesis and megasporogenesis are as follows
|The process of formation of a functional haploid microspore is called microsporogenesis.||The process of formation of a functional haploid microspore is called megasporogenesis.|
|Microsporogenesis takes place in pollen sac of the anther||Megasporogenesis takes place inside the ovule|
|Four functional microspores are formed as a result of microsporogenesis||Only one functional megaspore is formed as a result of megasporogenesis, the other three gets degenerated|
|The four micropores produced as a result of microsporogenesis, are arranged in a tetrad||
The four micropores produced as a result of megasporogenesis, are arranged linearly
During microsporogenesis and megasporogenesis, meiosis occurs and results into formation of four microspores and megaspores respectively, Later, mitosis occurs to give rise to microgametophyte and megagametophyte.
At the end of microsporogenesis, four functional haploid microspores are formed whereas at the end of megasporogenesis, four megaspores are formed out of which three degenerates and only one functional megaspore remains.