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16 Feb 2018

Why are patterns of large scale distribution clumped or patchy?

Describe the factors that make a species rare. Give examples.

What are two mechanisms by which populations can disperse? Can you provide an example of each?

explain in deatiles and type it please

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Jamar Ferry
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18 Feb 2018
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Related questions

2) Describe three examples of populations failing to achieve perfect adaptation, each from one of the following five course topics: population genetics, evolution of quantitative traits, life history evolution, kin selection, or sexual selection (2). For each example explain which evolutionary mechanisms are operating (2) and how they interact to result in imperfect adaptation (1). (Do not use more than one example on the same topic. Do not use any examples from before Lecture #8 unless you do so in the context of an explicit discussion of one of the five topics.)

Please Help!

1-Give some examples of how selection, gene flow, genetic drift, and mutation have acted on populations or species in the past. Try to think of at least one human and one nonhuman example. Why do you think genetic drift might be important to endangered species today?

2- Sickle-cell anemia is frequently described as affecting only Africans or people of Africa descent; it’s considered a “racial” disease that doesn’t affect other populations. How would you explain to someone that this view is wrong?

3- If two people with blood type A, both with the AO genotype, have children, what proportion of their children will be expected to have blood O? Why? Can these two parents have a child with AB blood? Why or why not?

a) List the characteristic features of autosomal dominant inheritance. How might reduced penetrance obscure this mode of inheritance in a pedigree?

b) Describe two molecular mechanisms that can give rise to autosomal dominant alleles, and describe an example of each.

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d) List the characteristic features of X-linked recessive patterns of inheritance. Describe circumstances in which the daughter of an affected male may display clinical features of the disorder.

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