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zaharov [31]
3 years ago
13

Someone help me please?

Biology
1 answer:
sweet [91]3 years ago
7 0
Homogeneous chromosoms pair up
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Modern Native Americans have very high frequencies of Type O blood. In some places in North and South America, the frequency is
Brilliant_brown [7]

Native Americans and Type O Blood

Modern Native Americans have very high frequencies of Type O blood.

In some places in North and South America, the frequency is as high as 100%. Anthropologists believe that early Native Americans arrived in North America by crossing over the Bering Land Bridge around 15,000 years ago, from East Asia.

Modern East Asian populations, with whom modern Native Americans share ancestry, do not have high frequencies of Type O blood. Instead, they have some of the lowest frequencies of Type O blood in the world.

B. Sickle-Cell Anemia

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For each of the following cases:

1. What forces of evolution are at work?  State all that apply.

Mutation

Natural Selection

Genetic Drift

Gene Flow.

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