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What is an allele?

In the nucleus of the cell, there are pairs of chromosomes which carry the same genes in the same places. 2) Alleles are different versions of these genes.3) For example, a person may have an allele for brow...
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Answered by Ella S. • Biology tutor
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Why do we vaccinate people - how does it work?

Vaccination is an important method used in healthcare to prevent people from getting certain diseases. Vaccines contain a dead or weakened ( attenuated) form of a pathogen, and the immune system responds to ...
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Answered by Ella S. • Biology tutor
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Rationalising the denominator (Surds)

When asked to rationalise simple Surd (square roots that cannot be reduced to a whole number) fractions in the form a/√b we are aiming to remove the surd in the denominator (bottom).-------------------------...
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Answered by Galen Y. • Maths tutor
20800 Views

Name the major organs of the Gastrointestinal tract

Oral cavity, Oesophagus, Stomach, duodenum, jejunum, ileum, colon, rectum, anus.
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Answered by David B. • Biology tutor
3220 Views

How is a waterfall formed in a river?

A waterfall forms in the upper course of a river. The water here flows over hard and soft rock. The soft rock is eroded more quickly than the hard rock. The river undercuts the hard rock leaving an overhang ...
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