Second, the logarithmic data transformation that the author recommends be carried out before linear regression analysis could lead to false conclusions about genotype–phenotype associations.

If you get a mutation in coding DNA, then the sequence of DNA could be changed. Changing the sequence of DNA can change the amino acids that make up the protein. This could have huge consequences.

In different cells around the body, certain genes will be switched on and others will be switched off. This will vary depending on which cells you examine.