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If a trait A exists in 10% of a populati...

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Text Solution

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In asexual reproduction, the reproducing cells produce a copy of their DNA through some chemical reactions. However, this copying of DNA is not accurate and therefore, the newly formed DNA has some variations.

It can be easily observed in the above figure that in asexual reproduction, very few variations are allowed. Therefore, if a trait is present in only 10% of the population, it is more likely that the trait has arisen recently. Therefore, it can be concluded that trait B that exists in 60% of the same population has arisen earlier than trait A.
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Knowledge Check

  • Which of the following is not a direct conclusion that can be drawn from Mendel's Experiment ? a) Only one parental trait is expressed b) Two copies of each trait is inherited in sexually reproducing organism c) For recessive trait to be expressed, both copies should be identical d) Natural selection can alter frequency of an inherited trait.

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