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18 August, 18:08

What can be interpreted about type 2 diabetes mellitus in monozygotic twins when it affects only one twin 70% of the time and affects both twins 30% of the time? a. The trait is recessive. b. Homologous genes can undergo chromatid exchanges. c. Nongenetic factors can influence expression. d. Mutation repair is incompletely penetrant.

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  1. 18 August, 18:24
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    The correct option is C. Non-genetic factors can influence expression.

    Explanation:

    Non - genetic factors can be described as factors other than genetic makeup. These factors include environmental factors and factors arising from the lifestyle of an organism.

    Certain studies have shown that both the genetic as well as the non - genetic factors play a role in the development of certain characteristics.

    In the above-mentioned scenario, both the monozygotic twins have diabetes but one of them is affected 70% of the time due to his lifestyle. The person might be consuming more sugars and alcohol.
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