HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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yes, because skin cells play an important role in reproduction
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yes, because DNA is passed on from parent to offspring
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no, because the changes have no effect on the gametes of the parents
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no, because offspring are immune to changes in parental DNA
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Detailed explanation-1: -Ultraviolet radiation can cause mutations in the DNA of skin cells that have been overexposed to the sun. This mutated DNA has no effect on future offspring because. This is a modal window.
Detailed explanation-2: -UVA (and also UVB) radiation cause indirect damage to DNA via absorption of photons by non-DNA chromophores. This generates reactive oxygen species like singlet oxygen or hydrogen peroxide that oxidize the DNA bases causing mutations.
Detailed explanation-3: -Unprotected exposure to UVA and UVB damages the DNA in skin cells, producing genetic defects, or mutations, that can lead to skin cancer and premature aging. UV rays can also cause eye damage, including cataracts and eyelid cancers.
Detailed explanation-4: -So, the correct answer is ‘Formation of thymine dimers/ thymidine’.
Detailed explanation-5: -Ultraviolet (UV) light induces specific mutations in the cellular and skin genome such as UV-signature and triplet mutations, the mechanism of which has been thought to involve translesion DNA synthesis (TLS) over UV-induced DNA base damage.