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slega [8]
3 years ago
7

How does crossing over break up linkage between alleles?

Biology
1 answer:
Ede4ka [16]3 years ago
3 0

It involves a physical exchange of segments from homologous chromosomes. Because of crossing over, alleles originally located on the same chromosome can end up on different chromosomes and be inherited independently


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Which shoulder ligament runs from the fingerlike projection of the coracoid process (superior to the glenoid cavity) to the coll
boyakko [2]
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4 years ago
Which of the following correctly describes the linkage that will be formed with the nitrogen base shown in the image below while
Lelu [443]

Answer:

C) Three hydrogen bonds will form with guanine.

Explanation:

Generally the DNA molecule is made up of Purines  bases of Adenine and Guanine,and Pyrimidine of Cytosine and Guanine.However,RNA contains a different pyrimidine of Uracil.Thus the pairing is A-U  am C-G.The uracil replaces Thymine.

The structure above is a Pyrimidine,because it is made up of single ring structure(an heterocylclic  aromatic  structure) compare to double structure of purines. Heterocyclic means it is ring form.Aromatic means it has resonance bonds which shift with the rings for stability.

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In RNA structure the Cytosine pair with the three hydrogen bonds with guanine,while Adenine pair with Uracil.This ensures stability of the RNA structure.  

6 0
3 years ago
Which of the following would happen to a cell if cellular respiration suddenly ceased?
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I think that glucose breakdown would stop, since oxygen is needed
8 0
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4 0
3 years ago
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