HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A small portion of the human population is born with a mutation that increases bone density
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All humans used to be lactose intolerant, and a mutation allowed some to process lactose
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All humans used to have brown eyes, so everyone with blue eyes carries a mutation.
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A small population of people in Burkina Faso were found to have a mutation that makes them immune to malaria
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Detailed explanation-1: -Blue-eyed? Thank a genetic switch that turns off your body’s ability to make brown pigment in your peepers. Researchers have finally located the mutation that causes blue eyes, and the findings suggest that all blue-eyed humans share a single common ancestor born 6000 to 10, 000 years ago.
Detailed explanation-2: -Originally, all humans had brown eyes. Some 6, 000 to 10, 000 years ago, a genetic mutation affecting one gene turned off the ability to produce enough melanin to color eyes brown causing blue eyes. This mutation arose in the OCA2 gene, the main gene responsible for determining eye color.
Detailed explanation-3: -In human beings blue eye colour is recessive to brown eye colour. A brown-eyed man has a blue-eyed mother.
Detailed explanation-4: -Can two parents with blue eyes have a child with brown eyes? Yes, blue-eyed parents can definitely have a child with brown eyes. Or green or hazel eyes for that matter. If you stayed awake during high school biology, you might find this answer surprising.