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iren [92.7K]
3 years ago
8

Explain natural selection using the finches as an example.

Biology
1 answer:
Lynna [10]3 years ago
7 0
Darwin's finches are a classical example of an adaptive radiation.Changes in the size and form of the beak have enabled different species to utilize different food resources such as insects, seeds, nectar from cactus flowers as well as blood from iguanas, all driven by Darwinian selection.
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The main natural carbon sinks are plants, the ocean and soil.

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In man, two abnormal conditions, cataracts (C) in the eyes and excessive fragility (F) in the bones, seem to depend on separate
juin [17]

Complete question:

In man, two abnormal conditions, cataracts (C) in the eyes and excessive fragility (F) in the bones, seem to depend on separate dominant genes located on different chromosomes.  Normal vision and normal bones are recessive traits.  A man with cataracts and normal bones, whose father had normal eyes, married a woman free from cataracts but with fragile bones.  Her father had normal bones.  

1. What is the genotype of the man with cataracts and normal bones?

2. What is the genotype of the woman with normal vision and fragile bones?

3. What type of offspring might this couple expect?

Answer:

  1. Cc ff
  2. cc Ff  
  3. F1)  4/16 = 1/2 = 25% CcFf, cataracts and fragile bones

              4/16 = 1/2 = 25% Ccff, cataracts and normal bones

              4/16 = 1/2 = 25% ccFf, normal eyes and fragile bones

              4/16 = 1/2 = 25% ccff normal eyes, normal bones

Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached files

Download pdf
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IN YOUR OWN WORDS, what are the definitions for Interkinesis (include when it happens)?
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INTERKINESIS:

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Specifically in plants when two daughter cells are produce by the process of meiosis I, immediately they prepare for meiosis II.

During this period nuclear envelope begin to appear for temporary, which is known as interkinesis that helps in the separation of two sets of chromosomes.

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