An allele is a variant form of a gene. some genes have a variety of different forms,which are located at the same position, or genetic locus, on a chromosome.
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Either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
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1. the color shown is the same as the color that it produces 2. the ink doesn't run out frequently
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A good marker is determined by a fair price for a good quality .
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C. Different organs working together to do a job
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Pretty self explanatory, sets of organs make up an organ system.
Hopefully this helps!
Brainliest please?
White blood cells produce antibodies which fight off the pathogens