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valina [46]
2 years ago
9

Provide a summary of Professor Steve Jones’ findings concerning how Natural Selection may be working today in humans.

Biology
1 answer:
lesya [120]2 years ago
7 0

Answer:

John Stephen Jones states that in evolution it is necessary to have into account three factors: natural selection, mutation, and random variation.

Explanation:

These three mechanisms influence evolution and they are responsible for generating phenotypic diversity that is observed in humans.

I recommend to read his article (chapter book):

Jones, JS. (2012). Is Human Evolution Over?. In Evolution 2.0 (pp. 167-176). Springer, Berlin, Heidelberg.

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A cross between two individuals that are heterozygous for eye and skin color would be an example of a _____ cross.
8090 [49]

A cross between individuals that are heter0zyg0us for two different traits is a dihybrid cross. <em>A cross between two individuals that are heterozygous for eye and skin color would be an example of a _</em>dihybrid<em>_ cross.</em>

----------------------

Dihybrid crosses involve individuals that expresses two different traits and are heter0zyg0us for each of them.

So let us imagine we are studing the characters eye color and skin color. Let us assume that both of them are coded by single diallelic genes.

For eye color there is

  • Dominant allele B that codes for brown eyes
  • Recessive allele b that codes for blue eyes

For skin color there is

  • Dominant allele A that codes for black skin
  • Recessive allele a that codes for white skin

So, an individual that is heter0zyg0us for both of them, is BbAa.

If this person crosses to another person with the same genotype, we are talking about a <u>dihybrid cross</u>, because two dibybrid individuals are involved.

                             Cross:    BbAa      x      BbAa

According to this information, we can aswer the question:

<em>When crossing two individuals that are heterozygous for eye and skin color we are referring to a</em><em> dihybrid cross.</em>

-----------------------------------

Learn more about dihybrid crosses at

brainly.com/question/1185199?referrer=searchResults

brainly.com/question/24076691?referrer=searchResults

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A population pyramid is an illustration that shows the
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Explanation:

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Which best explains how greenhouse gases heat the earth?
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Hey there, whats up

the answer is: <span>they trap heat in the atmosphere, warming the planet



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If the beaker was not cleaned, starch could have been in it.

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