In Western European populations, 90% of individuals have earwax as a yellow and viscous mass. For the rest, it is grayish and dry, since it contains less lipids. This trait is controlled by a pair of allelic genes, and the dry type corresponds to homozygosity for a recessive trait. In North China and Korea, the wet type is very rare – 4.2% and 7.6%, respectively. What is the genetic structure of the West European, North Chinese and Korean human populations for this trait?
Genetic structure: Western European population – 0.4624 (AA) + 0.4352 (Aa) + 0.1024 (aa); North Chinese population – 0.0004 (AA) + 0.0392 (Aa) + 0.9604 (aa); Korean population – 0.0016 (AA) + 0.0768 (Aa) + 0’9216 (aa).
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