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Harlamova29_29 [7]
3 years ago
5

Why are dna fragments with more base pairs found near the sample wells (origin) and the lower number of bp fragments found near

the anode?
Biology
1 answer:
olga55 [171]3 years ago
3 0
Gel electrophoresis is a separating technique that is usually used in the laboratory to separate DNA fragments on the basis of their sizes. DNA are typically loaded into one side of the gel called the well and electric force will be applied to separate the fragments. DNA fragments with more base pairs are found near the sample well compare to the anode because larger DNA fragments are not able to move through the gel at a faster rate like the ones with few number of base pair. Because DNA are negatively charged they move toward the anode, but all DNA fragments have the same amount of charge per mass, thus, small fragments move faster away from the well.
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Colorblindness is caused by a recessive x-linked gene. a woman that is heterozygous for this trait marries a man with normal col
IrinaK [193]

Answer;

The offsprings will be such that , a normal vision female, a heterozygous female, normal male and a colorblind male.

Explanation;

-Most X-linked traits in humans are recessive. One example of an X-linked trait is red-green colorblindness. Let (Xc) represent the recessive allele that causes colorblindness and (XC) represent the normal dominant allele. Females that are XCXC or XCXc have normal color vision, while XcXc females are colorblind. For males with; XcY are color blind, while those with XCY are have normal color vision.

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The offspring of the parents, XcXC x XCY, are: XcXC (heterozygous female), XCXC( normal vision female), XCY (normal vision male), XcY (color blind male).

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3 years ago
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During systole, the two ventricles contracts. The Right ventricle contracts, the pressure of the blood forces  the tricuspid valve to close,and therefore de -oxygenated blood pushes the pulmonary  valves to open and blood passes through the pulmonary artery to reach the lungs where exchanges of oxygen with carbon dioxide occurs.The blood is now oxygenated and returns to the left atrium via pulmonary veins.

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