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What is an allele?

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.
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Answered by Amy W. • Biology tutor
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What is a punnett square?

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.
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Answered by Amy W. • Biology tutor
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Compare and contrast the similarities and differences between meiosis and mitosis.

Both are forms of cell division.Both are used during gametogenesis (formation of gametes or sex cells such as spermatozoa and oocytes).Only mitosis is used during cell division of somatic or body cells.Meios...
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Answered by Sally P. • Biology tutor
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How do I write an effective introduction to an essay in an exam?

An excellent question! An effective introduction needs to make the argument of the essay clear from the outset. Your reader needs to immediately understand how you will answer the question and what your conc...
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Answered by Samuel J. • History tutor
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What is benzene and describe the 2 models used to explain it's structure. Provide a piece of evidence to show which of these models is incorrect.

Benzene With a formula of C 6 H 6 , the molecule has a cyclic structure due to it's 6 carbon atoms joined in a ring. It is symmetrically planar (flat) with it's 6 hydrogen's sticking out in the same plane. T...
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