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What is the Hardy-Weinberg equation?

The Hardy-Weinberg equation is: p 2 +2pq+q 2 =1 It is important to remember that p+q also equals 1 . p 2 is the frequency of the homozygous dominant genotype, and q 2 the recessive . 2pq is the frequency of ...
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Answered by Marlie C. • Biology tutor
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Describe how the body responds when a decrease in core body temperature is detected. (6 marks)

When the core body temperature falls below the optimum, vasoconstriction occurs meaning blood flow to the vessels supplying the skin is reduced. This is beneficial as it reduces lost energy. The body also re...
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Answered by Amy W. • Biology tutor
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What is the difference between Evolution and Natural Selection?

The theory of Evolution by Natural Selection was first proposed by Darwin in 1859. Evolution is the observation that species change over time, for example the beak of birds getting larger or the neck of gira...
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Answered by Anna D. • Biology tutor
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Enzyme inhibitors are often used as antiretroviral drugs in the treatment of HIV. Describe the structure of an enzyme and suggest how antiretroviral drugs would work in the treatment of HIV.

Enzymes are globular (globe-like) proteins, meaning they exist as 3D structures. As a protein, it is composed of a chain of amino acids which is able to fold into secondary structures such as alpha-helices a...
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Answered by Declan C. • Biology tutor
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What are genes and how do work?

Genes are the code that makes up all life on Earth. Genes are sections of the long chain-like molecule called DNA, which is found coiled up into chromosomes in the nucleus of cells. The most important part o...
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Answered by Anna D. • Biology tutor
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