Search over 10,000 free study notes

Vertical transmission occurs during asexual reproduction. During the cell cycle, a bacterium will replicate its DNA (found in the form of a circular plasmid) which will contain the gene for antibiotic res...

The proportion of the population with genotype Bb can be calculated using the two equations of the Hardy-Weinberg principle. These equations are: p + q = 1  where: p = frequency of the do...

DNA is made of small subunits called bases that join together to form a long chain. The bases in each chain join to the bases in another chain to form a structure that looks a bit like a ...

The heart is an organ made of muscle in the centre of the chest. It's role is to pump oxygenated blood around the body to enable our functions to be carried out. During a heart attack, a section of the he...

The myelin sheath is a fatty substance which surrounds and insulates neuron axons (i.e. it does not allow potassium or sodium ions to pass through it), which allows fast propagation of action potentials a...