Question

Which will most likely cause an increase in the frequency of genetic mutations in
humans?
А
increased exposure to mold spores in the air
B
increased exposure to the rising levels of atmospheric CO2
с
increased exposure to bacteria in drinking water
D
increased exposure to X-rays

Answer 1

Answer:

Increased exposure to X-rays

Explanation:

X-rays shoot harmful radiation through your body, that's why when you go to the dentist or other places and they take a X-ray they give you a lead vest to protect your organs from unneeded radiation.

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Answer 2

Increased exposure to X-rays is the most likely cause of an increase in the frequency of genetic mutations in humans (Option D).

• A mutation is any alteration in the nucleotide (DNA) sequence of the genome in the cells of an organism.

• Mutation can be caused by physical factors (e.g., X-rays) or chemical agents (e.g., pesticides such as DDT).

• X-rays are well known to cause mutations by breaking covalent bonds in DNA, which may be erroneously repaired, thereby leading to deletions of nucleotides.

In conclusion, increased exposure to X-rays is the most likely cause of an increase in the frequency of genetic mutations in humans (Option D).

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