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Anuta_ua [19.1K]
3 years ago
5

Today, many biologists and anthropologists agree that the most intense selection pressures our species faces come from

Biology
1 answer:
UNO [17]3 years ago
8 0
The major threat to humans and the most prominent selection pressure are disease organisms that target the immune system.
These organisms impair the body's ability to fight off invasion from pathogens, and there is no "back up immune system" to protect the immune system from attack. An example of a pathogen that attacks the human immune system is the Human Immunodeficiency Virus (HIV).
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GenaCL600 [577]
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3 years ago
In the sweet pea crossing experiment by Bateson and Punnet, the F2 generation had many more offspring with the phenotypes of pur
gizmo_the_mogwai [7]

Answer:

The F2 generation can be explained because the alleles for flower colour and pollen shape are linked.

Explanation:

<em>When two alleles are linked on the same chromosome, there is a high tendency for the alleles to be inherited together. Consequently, the frequency of the alleles recombining in subsequent generations is low.</em>

This is what Bateson and Punnet observed. There exist a linkage between P and L alleles and also p and l alleles, thereby increasing their frequencies  of occurring together and decreasing the frequency of their recombination.

Thus, the F2 generation observed by Bateson and Punnet is due to linkage of alleles.

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3 years ago
Which of the following answer choices best describes the image shown above?
fomenos

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elena-14-01-66 [18.8K]

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3 years ago
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