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People's daily experiences can contribute to their belief that earth/ species do not change because we are changing with it as it is happening. Also the changes happen gradually so you can't constantly see to believe it.
When it is said that mutation is the ultimate source of genetic variation it means that it creates several new combinations which is similar to meiosis and fertilization because <span> new alleles and genes appear. It is just about some common points.</span>
The right answer for the question that is being asked and shown above is that: "C. People can be tested for mutations on these genes." The statement that is true about BRCA1 and BRCA2 genes is that p<span>eople can be tested for mutations on these genes.</span>
