Q5 of 43 Page 53

Write briefly the significance of mitosis and meiosis in multicellular organism.

• Mitosis creates the cells necessary to add more mass to the body, as well as more cells to cope with the growth, such as new blood cells. In case of injury mitosis is involved in healing of the tissues.


• Meiosis also produces genetic variation by way of the process of recombination.


It helps to conserve the no. of chromosomes in a species.


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2

What are the various stages of meiotic prophase-I? Enumerate the chromosomal events during each stage?

 3

Differentiate between the events of mitosis and meiosis .

 4

Write brief note on the following

a. Synaptonemal complex


b. Metaphase plate


 6

An organism has two pair of chromosomes (i.e., chromosome number = 4). Diagrammatically represent the chromosomal arrangement during different phases of meiosis-II.