- It is easy to cultivate.
- It has a short life cycle which made it possible to study several generations within a short period.
- Large quantity of samples can be available for analysis.
- It has different contrasting characters. For example; tall or dwarf plants, yellow or green seeds.
- It was easy to track the passing of these characters in the progeny.
- Pea plants are naturally Self pollinating.
- It has perfect bisexual flowers containing both males and females part.
- Because of self pollination,plants are homozygous . It is , therefore easy to get purelines for several generations.
- It is easy to practice cross pollination because pollen from one plant can be introduced to the stigma of another plant.
Gram Stain In 1884, Hans Christian Gram discovered a staining technique that could help to visualise the infectious bacteria clearly and can easily study their morphology. In this technique he used crystal violet (the primary dye), Gram’s iodine (IKI, the mordant), an alcohol rinse (decolorizer), Safranin (counter stain ). A Gram stain is a test that checks for bacteria at the site of a suspected infection such as the throat, lungs, genitals, or in skin wounds. Gram stains may also be used to check for bacteria in certain body fluids, such as blood or urine . This color choice provides differentiation between bacteria that stain purple, called gram-positive, and those that stain red, called gram-negative. The difference between gram-positive and gram-negative bacteria is due to the physical nature of their cell walls and how it reacts to the series of reagents applied to the cells . Gram positive bacteria has thick peptidoglyca...
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