Question

How will differentiate between mitosis and meiosis? at least 5 differences

PET (positron emission tomography) is often used for the early detection of cancerous tumors. In this case, radiolabeled glucose is administered to the patient and its distribution in the body is monitored by the PET. Can you explain why tracking the distribution of glucose in the body might help detect a tumor?

Answer 1

Mitosis	Meiosis
Takes place in the somatic cells.	Takes place in the germ cells.
Daughter cells are identical to the parent cell.	Daughter cells are not identical to the parent cell.
Daughter cells produced are diploid.	Daughter cells produced are haploid.
Crossing over between the homologous chromosomes doesn't takes place.	Crossing over between the homologous chromosomes takes place.
Takes place in a single stage.	Takes place in two stages,meiosis 1 and meiosis 2.

In PET scanning patient is given radiotracer such as F-18 fluorodeoxyglucose or FDG. FDG is similar to glucose. Cancer cells are known to perform higher metabolism than the normal body cells hence their glucose requirement is comparatively higher. When patient is given radiotracer  molecules such as FDG, these molecules start to accumulate in the cancerous sites and release radioactivity. Detection of radioactivity help in detecting the spread of the cancer.