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How does genetic variation occur in meiosis?

There are three ways that the cells produced in meiosis are different from each other and from the parent cells:1) Independent assortment: this is the idea that during metaphase 1 and 2 pairs of homologous c...
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Answered by Amy L. • Biology tutor
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A-Level question: How is blood glucose regulated?

Blood glucose must be regulated, normal blood glucose for a non-diabetic person is 4.0-5.9mmol. A low blood glucose (sugar) is harmful and a high blood can indicate diabetes. the pancreas and liver and cruci...
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Answered by Erin J. • Biology tutor
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My knowledge of biology is good but I never seem to get all the marks on a question - how can I get as many marks as possible?

This is a really common problem of knowing all the knowledge behind the question but still not getting the most marks you can. The best way to manage this is to simply learn the mark scheme; the questions th...
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Answered by Bethan S. • Biology tutor
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How do I tackle questions that seem only vaguely related to the course I've covered?

These questions are particularly stressful, because they seem completely random. But the most important thing to do is relax and think back to your syllabus. Can you make any links to the topic at hand and s...
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Answered by Juliet S. • Biology tutor
2830 Views

How are ABO blood groups genetically transmitted?

The ABO blood group is an example of codominance and multiple alleles. Unlike other characteristics which are determined by 2 alleles, blood group is determined by 3 alleles. The allele I A corresponds to bl...
Answered by • Biology tutor
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