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Simply put, it is a form of a gene which can lead to different phenotypes, e.g. eye colour. There is one allele that codes for blue eyes and another allele that codes for brown eyes.

A punnett square is a diagram that is used to predict the outcome of a particular cross or breeding experiment. This can be used for plants, animals and humans.

Everything you do in English should be carried out in stages to ensure that you've done it all thoroughly. ​First, when analysing an image, you need to look at the colours. Dark colours tend to represent mou...

This problem is one that can be confusing if not tackled orderly. Let us have an example of a system of 2 equation: 3x + 5y = 13 4x + 7y = 18 First we must choose one of the two and then express one of our v...

Two trains move towards one another. The first one has a speed of 30 km/h , and the second one travels at 50 km/h . The initial distance between them is 160 km and they both begin to move at the same time. A...