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Alleles are different forms of the same gene which are located on the same part of the chromosome. 

Genes are made up of information needed to produce different proteins, so allele...

Leaching from the excessive use of fertilisers causes a nutrient build up in neighbouring rivers or lakes. As a result of the increased nutrients plants within the lake or river grow rapidly, including al...

The main parts of the digestive system are the...

- mouth

- oesophagus

- stomach

- liver

- gall bladder

- panc...

Let us first understand what is meant by the term "phenotypic variation". Simply, the phenotype of an organism is its observable characteristics - like how it looks, how it behaves, and so on. D...

When oxygen reaches the alveoli of the lunngs, it diffuses into the blood. The oxygen enters the red blood cells and combines with the haemoglobin to form oxyhaemoglobin. When the red blood cells reach...