PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Except for identical twins, all people have the same DNA.
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Even though identical twins do share a significant amount of similar DNA, there are clear genetic mutations between each member, proving that they’re not carbon copies of each other.
Detailed explanation-2: -Identical (i.e., monozygotic, or MZ) twins share 100 percent of their genes, whereas fraternal (i.e., dizygotic, or DZ) twins generally share only 50 percent of their genes.
Detailed explanation-3: -The study of 381 pairs of identical twins and two sets of identical triplets found that only 38 were genetically identical, Tina Hesman Saey reports for Science News. Most had just a few points of genetic mismatch, but 39 had more than 100 differences in their DNA.
There is 1 question to complete.