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Debora [2.8K]
3 years ago
14

Gel electrophoresis sorts DNA strands by length because longer DNA strands travel through the gel slower than shorter strands. W

hy do scientists need to sort DNA strands by length?
Biology
1 answer:
Natali [406]3 years ago
8 0
Gel Electrophoresis is a way to sort and measure the DNA strands. Scientists use the technique whenever they need to sort DNA strands according to lengths, this is because it helps them determine patterns, banding patterns create unique fingerprint for a certain individual. During the process the shorter strands move faster because they have less mass compared to the longer strand. Therefore, the short strands end up farther away from the starting point than the longer strands, which is how the different in lengths sort themselves out. 
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Answer:

The correct answer is - 75% or 3/4.

Explanation:

In the given question, there is a cross between III-6 and III-7 that produced two double eyes monsters and expected one more. As given in the image that the A or single eye is dominant over the a or double eye then both parents must be heterozygous as they produced double eye offspring (aa) and they do have only one eye.

then chances of single eye offspring would be -

cross: Aa and Aa

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a         Aa      aa

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