The Tibetans and Han Chinese share several genetic traits and DNA. However, the EPAS1 gene, which increases the ability of red blood cells to carry oxygen even in low oxygen environments, is only commonly found in the Tibetan population that live in higher elevations. Explain why this gene is only common in Tibetan populations from the perspective of competitive advantage and natural selection. Write your answer in three to five sentences.
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While both groups share traits and DNA only one group needed or used certain traits. The Tibetans gained a competitive advantage to live at higher altitudes than the Han Chinese. They gained this advantage through natural selection, which prevented un-useful traits from being passed on.
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Well, it seems like Mother Nature had a little chuckle here. You see, living in those higher elevations where oxygen is as scarce as a good joke at a dentist's office, having the EPAS1 gene gives Tibetans a leg up in the oxygen-carrying department. While Han Chinese and Tibetans may share genetic traits, it appears that this gene just couldn't rise to the occasion for the Han Chinese in a high altitude environment. Natural selection gave the Tibetans this unique advantage to help them thrive in their challenging surroundings and make it easier for them to breathe in rarified air. It's like having a built-in oxygen tank - talk about a high-altitude advantage!
The prevalence of the EPAS1 gene in Tibetan populations can be explained by competitive advantage and natural selection. In higher elevation areas, such as the Tibetan Plateau, there is lower oxygen availability, which poses a challenge for individuals living there. However, the EPAS1 gene allows the Tibetans to have an advantage by increasing their red blood cells' ability to carry oxygen even in low oxygen environments. This genetic adaptation provides a selective advantage to individuals with the EPAS1 gene, allowing them to survive and reproduce more successfully at higher altitudes compared to individuals without the gene. Over time, this has led to a higher frequency of the EPAS1 gene in the Tibetan population due to natural selection.
