|
Skin color is determined by three sets
of genes on chromosomes #'s 1, 2,and4. The dominant genetic
code, gene "A" translates into a protein called melanin.
This dark pigment is like a natural UV blocker. The greater
the number of dominant genes one has, the greater the amount
of melanin, the darker the skin, and the more UV protection
a person has. These genes have been selected-for near the
Earth's equator where the intense UV photons can cause a
great deal of damage to lighter skin.
Count up the number of dominant and
recessive genes and place your baby's genotype for skin
color in the data table.
|
|
|