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What is a test cross (Genetics)?

In genetics, sometimes it is not easy to tell if an organism is heterozygous (having two different alleles of a gene) for a certain trait or if it is a homozygous (having the same identical alleles of a gene...
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Answered by Alisa H. • Biology tutor
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Explain how nerve impulses are transmitted along and between neurones

Transmitting Along Neurones When a nerve cell is not stimulated, it is in a resting state. During this state, the inside of the axon is relatively more negative than outside of the axon, this is called the r...
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Answered by Alisa H. • Biology tutor
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What types of enzymes are there?

There are generally three types of enzymes.Amylase (Carbohydrate) enzymes, Pepsin (Protease) enzymes and lipase enzymes.Amylases break down starch in carbohydrates into sugars that can be used by the body. T...
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Answered by Hibba S. • Biology tutor
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What is the difference between mitosis and meiosis?

I always remember mitosis as the process that leads to "genetically identical clones" and meiosis being the process that does not lead to clones but is the process that produces a cell with half th...
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Answered by Pooja D. • Biology tutor
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How does cholera cause diarrhoea and dehydration?

Cholera is single-celled organism that produces a toxin. The toxin attaches to the ion receptors in the small intestine which causes it to secrete chloride ions into the lumen. This then causes water to move...
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Answered by Madhangi P. • Biology tutor
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