1. Compare and contrast mitosis and meiosis. 2. What major event occurs during interphase?

1.

contrast between mitosis and meiosis

Mitosis

- it takes place in somatic cells in multi cellular organisms in order to provide growth, however, in unicellular organisms it is reproductive division as well. is the means of reproduction in single-celled organisms. Other organisms use it for the growth of tissues (somatic cells)

- exact number of chromosome in offspring

- no recombination or crossing over

- no pairing found

- major phase: prophase, metaphase, anaphase, telophase

Meiosis

- takes place in sex cells to form gamete formation during sexual reproduction

- half of the chromosome number found in gametes of the parents thus, known as reduction division

- due to crossing over takes place recombination  found.

The pairing of chromosomes takes place

- major steps:

Meiosis 1 – prophase, Metaphase, anaphase, Telophase, and

Meiosis 2: Prophase, Metaphase, Anaphase, and Telophase

2. Interphase takes place prior to both mitosis and meiosis which is divided into 3 sub phases-G1, S and G2 phases.

The major events are as follows:

G1- RNA and protein synthesis takes place and cell grows in size

S- DNA replication takes place, Centriole duplication occurs and synthesis of histone proteins.

G2-  RNA and Protein synthesis continues.

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