The advantages of Selecting pea plant for experiment by Mendel

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.

Comments

FASINATING FACTS ABOUT MICROORGANISMS

Did you know... 1. If you pick up a handful of garden soil you will be holding hundreds if not thousands of different kinds of microbes. One single teaspoon of soil contains 1 billion bacteria & 120,000 fungi & 25,000 algae. 2. Microbes have been around longer than anything else on Earth, longer even than dinosaurs. If you imagine Earth began as a single day: Microbes appeared at 5am Dinosaurs appeared at 10pm... and humans appeared seconds before midnight 3. There are 10 times more bacteria in the average human's digestive system than there are cells in the entire body. This is approximately 1kg of bacteria. 4. There are more microbes on one person's hand than there are people on the planet. 5. Microbes generate at least half the oxygen we breathe. 6. Most microbes do not cause disease - less than 5% do. 7. Cattle belching and farting produce about 20% of the Earth's methane 8. A study found that 30% of all people didn't wash their hands after using a pu...

What are Gram positive and Gram negative bacteria ?

What are bacteria ? Bacteria are procaryotes that are usually single-celled organisms. Most bacteria have cell walls that contain the structural molecule peptidoglycan . They are found in soil, water, and air and are also major inhabitants of our skin, mouth, and intestines . Some bacteria live in environments that have extreme temperatures, pH, sanlinity . some bacteria cause disease, many play more beneficial roles such as cycling elements in the biosphere, breaking down dead plant and animal material, and producing vitamins. What are Gram positive bacteria ? Gram positive bacteria are bacteria that stains purple in colour after gram staining which indicates a positive result, it helps to classify bacteria on the basis of their cell wall. Below is the examples of some Gram positive bacteria: What are Gram negative bacteria ? Gram negative bacteria are bacteria which gives negative results by retaining the gram stain ,which gives pink colou...

Gram staining | History | Application |Principle | Procedure

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...

Biology Unwinding

Search This Blog