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What is crossing-over?

In prophase I of meiosis, homologous, non-sister chromatids form connections called chiasmata at matching loci. The complex then splits to give chromatids with different combinations of genes than were prese...
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Answered by Emma S. • Biology tutor
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Where do all the stages of respiration (aerobic and anaerobic) happen?

The first part of aerobic respiration is to convert glucose into pyruvate in a series of reactions known as glycolysis, which happens in the cytoplasm of cells. Glycolysis consumes 2 molecules of ATP and pro...
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Answered by Eve L. • Biology tutor
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Describe the process that allows an action potential to be passed across a synapse in the parasympathetic nervous system.

The action potential arrives at the presynaptic knob and causes the depolarisation of the plasma membrane. This causes voltage gated calcium channels to open allowing calcium to diffuse into the presynaptic ...
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Answered by Rebecca O. • Biology tutor
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Explain how the structure of mRNA differs from the structure of DNA

The structure of mRNA differs from the structure of DNA in that mRNA is a single-stranded molecule whereas DNA is a double-stranded molecule in the form of a helix. Another difference between them is that th...
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Answered by Maria Z. • Biology tutor
21797 Views

Explain why a genetic fingerprint is unique to every individual

The genetic fingerprint is differentiated based on the differing lengths of short tandem repeats (STRs) between genes. Everyone has different lengths of STRs so when their DNA is hydrolysed by restriction en...
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Answered by Solomon B. • Biology tutor
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