The size of the chromosomes in mitotic phase of animal and plants sp generally varies between 0.5 µ and 32 µ in length, and between 0.2 µ and 3.0 µ in diameter.
The longest metaphase chromosomes found in Trillium - 32 µ.
The giant chromosomes found in diptera and they may be as long as 300 µ and up to 10 µ in diameter.
In general, plants have longer chromosomes than animal and species having lower chromosome numbers have long chromosomes than those having higher chromosome numbers
Among plants, dicots in general, have a higher number of chromosome than monocots.
Chromosomes are longer in monocot than dicots.