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Leona [35]
1 year ago
9

Dr. Kettlewelll predicted that clean forests would have _____________ colored moths, and polluted forests would have _________ c

olored moths.
Biology
1 answer:
Mashcka [7]1 year ago
4 0

Answer:

Kettlewell thought that if natural selection caused the change in the moth population, the following must be true: Heavily polluted forests will have mostly dark peppered moths. Clean forests will have mostly light peppered moths. Dark moths resting on light trees are more likely than light moths to be eaten by birds.

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1. Which of the following supports the theory that all modern human populations are descended from a single ancestral population
Trava [24]

Answer:

a. Comparative molecular studies trace our earliest genetic material to Africa

Explanation:

With the development of the genetics we have been able to come to new findings or confirm some suspicions when it comes to the origin of the humans. The genetic analyses of the human DNA and the other hominids that have died out, as well as out closest ''cousins'' in the animal kingdom, have shown that the earliest human ancestors have evolved in Africa. Over time, as the conditions allowed it, the hominids started to migrate out of Africa and gradually started to settle all around the planet.

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1 year ago
45. Which observation of dihybrid crosses led to Mendel's law of independent assortment?
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I believe i the correct answer is c because he notices that some of the traits weren't being passed on.
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3 0
2 years ago
Calix’s karyotype showed that he has a genotype of XXY. Explain how nondisjunction caused Calix to be XXY.
Juli2301 [7.4K]

Answer:

A XY or XY gamete fuses with a normal gamete (X or Y)

Explanation:

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The fusion of these abnormal gametes produced by nondisijuction with a normal gamete (X or Y chromosome). This leads to a condition called ANEUPLOIDY, which is a chromosomal disorder. In the case od Calix, XXY is an ANEUPLOIDY state that could have resulted because there was a fusion between a XX gamete and Y gamete or XY and X. The XY or XX gametes are produced as a result of nondisijuction.

4 0
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Institutional review board (IRB) is the regulatory authority to protect the rights of subjects invloved in a resaerch.

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2 years ago
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