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In this question you must first look at the wording. This is a describe question and therefore a description is required but not an explanation. It is worth 5 marks so aim to describe 5 or more reasons ho...

Meiosis produces four cells through two cell divisions, whereas mitosis produces two cells through one cell division 2. Meiosis produces haploid cells, whereas mitosis produces diploid cells 3. Meiosis ha...

Haemoglobin is an oxygen carrying molecule found in red blood cells. Haemoglobin is made up of four polpeptide chains (2 alpha, 2 beta), and consists of four haem groups (iron associated with heam) contai...

A synapse is a junction or space between two neurons or a neuron and a receptor which allows the transmssions of an electrical or chemical signals to another cell. The first neuron is called the presynapt...

a i) a gene is a section of DNA that codes for a protein and has a specific location on a chromosome while an ellel is just a different form of a gene

ii) a recessive allele is one that is expresse...