Answered: Explain why most of these DNA…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter9: Patterns Of Inheritance

Section: Chapter Questions

Problem 2SQ

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Explain why most of these DNA polymorphisms are not
responsible for the phenotypic differences between people

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Step 1

Each person's diploid genome contains about 1 million unique DNA polymorphisms which mean sequence differences that are not shared with another person, while the remaining approximately 2.6 million polymorphisms are shared in the genomes of two individuals.

Step 2

It has been studied that some of the millions of DNA polymorphisms between the genomes must be responsible for the phenotypic differences that distinguish people as individuals. However, only a small fraction of these DNA sequence changes actually impact phenotype in reality.

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