“A well known biologist stated that the life history of an organism can be summed up as gametic fusion, equational division and reductional division.” Comment.

The given statement is correct on the basis of the following facts :

1. The gametic fusion takes place at the time of fertilisation when sperm and ovum fuse to form a diploid zygote.

2. The zygote is divided by mitotic division during its embroynic life and post embryonic life to form a well developed individual.

3. A mature individual produces gametes by gametogensis. Reductional division takes place at this stage and results in the formation of haploid gametes.

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Why is meiosis called the reductional division and mitosis called equational division?

Draw the diagram of meiosis.

Name the process in which there is an exchange of genetic material between non-sister chromatids of homologous chromsomes during meiosis.

Draw diagram of mitosis.

Cell Cycle and Cell Division

“A well known biologist stated that the life history of an organism can be summed up as gametic fusion, equational division and reductional division.” Comment.