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Nuetrik [128]
3 years ago
15

A disease called phenylketonuria causes mental problems, reduces skin pigmentation, and also affects the coloration of urine. Wh

at kind of effect is exhibited by the gene responsible for this disease?
Biology
1 answer:
Savatey [412]3 years ago
6 0
Pleiotropic which means a gene affects multiple traits

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Answer:

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Explanation:

Natural selection functions under the premise of survival of the fittest, where stressful situations such as lack of resources will select the organisms with advantageous traits. In this case, the decrease on seeds affected particularly the numbers of small, soft seeds over large, hard seeds. This stressful situation will select the finches with the advantageous trait of having large beaks, because they are able to feed from large, hard seeds. This trait will be passed on to future generations through natural selection, which eventually will result in the population of birds with large beaks will increase on the island.

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