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lawyer [7]
3 years ago
11

Describe the procedure of hypophysation​

Biology
1 answer:
svp [43]3 years ago
3 0

Answer:

1. The pituitary gland is collected from a recently-killed fish - donor through the removal of the dorsal side of the skull.

2. The pituitary glands are preserved in alcohol or nitrogen (freezing method).

3. The pituitary gland is prepared by locating it in distilled water or a saline solution

4. Intramuscular administration via injection.

5. Fish are released inside a breeding tank.

Explanation:

Hyphosysation is a technique that is used to <u>induce reproduction in fish when they are unable to spawn because conditions are not optimal</u>. During this process, fish are injected with substances that are released from the pituitary gland, leading to the acceleration of spawning. These secretions are: Somatotropic hormone, Adrenocarticotropic hormone, Prolactin, amongst others.

This process uses two inducing agents: <em>natural (pituitary substances) and synthetic (e.g. steroids).</em>

The process consists of the next steps (summarized):

1. The pituitary gland is collected from a recently-killed fish - donor through the removal of the dorsal side of the skull.

2. The pituitary glands are preserved in alcohol or nitrogen (freezing method).

3. The pituitary gland is prepared by locating it in distilled water or a saline solution

4. Intramuscular administration via injection.

5. Fish are released inside a breeding tank.

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This in the future may affect the gene pool for instance if the viral DNA (your gene) was inserted in the middle of another gene or important regulatory sequence of the cell DNA, and this alteration may be passed on into offspring and become present in the gene pool, which could have bad effects.

The effects on the gene pool really depends on what the virus ends up doing. For example, it may fix the function of a damaged gene which is the goal, and allow for a working gene to be in the gene pool, which would be good. The problem with gene therapy is that it's difficult to predict 100% what the virus will do every time it is given to a patient.

But it's very important to consider that it will only affect the gene pool if the virus is able to enter and alter germ cells (reproductive cells). If the virus, enters somatic cells (regular body cells) this will not be passed on to future generations. So viruses can be designed to avoid germ cells and avoid this gene pool issue. Also, some viral vectors use viruses that do not integrate their DNA, the cells just express the viral DNA (create the desired protein from it) and over time the viral DNA is degraded/ lost which wouldn't pose this threat.

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3 0
3 years ago
Which pair of scientists should Elizabeth write instead of X and Y?
tatiyna

Answer:

Schleiden had even supposed the nucleus to be a constituent part of the wall, sometimes lying enclosed between two layers of its substance, and Schwann quoted this view with seeming approval. Schwann believed, however, that in the mature cell the nucleus ceased to be functional and disappeared.

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