What are some examples of recent, beneficial mutations in humans?
Lactose tolerance and ability to thrive in low oxygen environments.
The ability to digest milk was retained by adult humans at some point during the last few thousand years or so. Normally, this ability is limited to young mammals, who gradually lose it as they grow older. However, not all humans have this evolutionary development, as some individuals are intolerant to lactose.
Because they have adapted to extremely low oxygen levels (roughly 15% compared to 21% in the extremely high Tibetan Plateau region), Tibetans also make excellent guides for climbers, known as sherpas.
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Some examples of recent, beneficial mutations in humans include:
- Lactose tolerance: Mutations that allow individuals to digest lactose into adulthood.
- Malaria resistance: Mutations like sickle cell trait and hemoglobin C that confer resistance to malaria.
- High-altitude adaptation: Genetic adaptations in populations living at high altitudes, such as the Tibetan and Andean populations.
- Skin pigmentation: Mutations that provide protection against harmful UV radiation, such as those found in populations living near the equator.
- HIV resistance: A mutation in the CCR5 gene that confers resistance to HIV infection.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- Can a hybrid be a mutation? If we check the DNA of any organism, excepting clones, aren't all individual organisms unique? Do mutations occur all the time in sexual reproduction? Basically is variation a "slight" mutation?
- What does the shared genetic code of all life on Earth provide evidence for?
- A mutation occurred in the middle of a DNA sequence from the coding strand as shown by the partial sequence below. Determine the molecular impact of this mutation and explain the possible effects resulting from this mutation. Please be specific on this?
- Why can comparisons of protein similarity between species can reveal the degree of genetic kinship?
- What are germ cell mutations?

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