How do traits get expressed?
A trait in an organism results from the action of proteins (e.g., growth hormone in plants is a protein which is manufactured from a gene). Each protein is made by information from the genes for that protein. In the example of pea plant, there are two genes for plant height–‘T’ and ‘t’ ‘T’ is dominant over ‘t’. In a heterozygous plant (Tt), only the gene ‘T’ will be able to make proteins as it is dominant over the ‘t’ gene. This protein would be the growth hormone which will result in the plant being tall.
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