Genes And Alleles

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A gene is an instruction/code for making a certain protein
Having different versions of proteins means we end up with different characteristics.

TWO TYPES OF PROTEINS: -STRUCTURAL e.g: skin, hair, blood and cytoplasm.
-FUNCTIONAL e.g Enzymes such as amylase and pro-tease.

GENOTYPE – The genes an organism has.
PHENOTYPE – The characteristic/feature displayed by the organism

Some features are controlled by genes only Eye colour. Some features are controlled by environmental factors only Scars. Some


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