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How does MRI work?

MRI stands for magnetic resonance imaging and uses the application of a magnetic field and radio frequency photons to manipulate the spin state of protons (hydrogen nuclei). Hydrogen is one of the most abund...
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Answered by Sebastian V. • Biology tutor
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How does meiosis achieve genetic diversity?

Meiosis produces 4 haploid daughter cells and is essential for forming gametes that contain one copy of each chromosome. Meiosis allows genetic diversity which gives rise to new combinations of genetic allel...
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Answered by Shannon G. • Biology tutor
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Describe how human gonads are under hormonal control.

Gamete production is controlled by hormones in humans. The hypothalamus produces Gonadotrophin-releasing hormone (GnRH) which in turn stimulates the anterior pituitary gland to produce leutinizing hormone (L...
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Answered by Martin F. • Biology tutor
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Explain how DNA is converted into protein in eukaryotes.

DNA is a nucleic store of genetic information in eukaryotes. It consists of a combination of four different nucleobases; adenine, cytosine, guanine and thymine (abbreviated to A, C, G and T respectively). So...
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Answered by Martin F. • Biology tutor
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Microbiological techniques- gel electrophoresis

Scientists in labs use a technique called gel electrophoresis which allows them to separate a mix of DNA fragments by size . This is used in conjunction with PCR (polymerase chain reaction) and restriction d...
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Answered by Lizzie B. • Biology tutor
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