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There are several arguments for having in vitro fertilisation. Firstly, it allows people who couldn't otherwise have children to start a family. Also the embryos that are used for IVF, if there are signs ...

The mutation present in sickle cell anaemia causes a change in the primary structure of amino acids in the haemoglobin molecule. This change in primary structure changes the tertiary structure of a haemog...

Cystic fibrosis is a genetic condition which causes an increase in thick mucus, which can become deposited in the lungs. The condition affects the body's ability to control the salt and water which moves ...

There are certain words that need to be defined before answering the question, just to make sure that it is fully understood.Allele = a different form of a gene Heterozygous = in each fruit fly, there are...

The surface area of the small intestine in a healthy person is really large! The reason for this is the villi covering the inside of the small intestine. We need all this surface area to absorb the nutrie...