If both Percy and Nina Fawcett (played by Charlie Hunnam and Sienna Miller) have got blue eyes, then all their children should have blue eyes too - since that phenotypic characteristic is granted by a pair of recessive alleles, the descendants are homozygous with respect to the eye-colour gene (which is necessarily for blue), hence Jack Fawcett (Tom Holland) "should" have blue eyes.
However, 2 blue-eyed parents can have a brown-eyed child if one parent has a working gene HERC2 & the other has a working gene OCA2. Brown eyes are HERC2+OCA2, a combination absolutely possible w/2 blue-eyed parents as persons with blue eyes can be carriers of one of these working genes. See genetics.thetech.org/how-blue-eyed-parents-can-have-brown-eyed-children .
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05/03/2025 alle ore 08:03
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