In the Igf-2 allele, which chromosome is imprinted? Which is expressed?
Match the following terms with their descriptions below.
If a cell is fused with another cell, which of the following would be the best example of a trans-mechanism of epigenetic control?
Answer: A gene that is originally silenced in one cell but expressed in the other is silenced in the hybrid.
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The trans-mechanism of epigenetic control can result from the fusion of cells, as seen when certain diets in mice alter DNA methylation. An example of gene imprinting, another form of epigenetic control, is seen in the Igf-2 allele where the paternal allele is expressed and the maternal allele is silent.
The fusion of cells can lead to a specific type of epigenetic control, termed trans-mechanism. This process is best exemplified in the case of the pseudoagouti offspring phenomenon in mice. When female mice are fed a specific diet, it alters the methylation processes of their DNA. As a result, a specific region in the agouti gene becomes hypermethylated which in turn leads to an increased proportion of pseudoagouti offspring.
Addressing the second part of your question, in the Igf-2, or the Insulin-like growth factor 2 gene, it is the paternal allele that is usually expressed while the maternal allele is imprinted and silenced. Imprinting is another form of epigenetic control where the activity of a gene is determined based on which parent the allele was inherited from.
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If the rate of photosynthesis significantly increased, More glucose and oxygen would be produced: Photosynthesis produces glucose and oxygen as byproducts. If the rate of photosynthesis significantly increased, more glucose and oxygen would be produced.
The rate of photosynthesis refers to the amount of carbon dioxide that a plant can convert into organic compounds, such as sugars and starches, per unit of time through the process of photosynthesis. If the rate of photosynthesis significantly increased then:
Carbon dioxide levels would decrease: Photosynthesis uses carbon dioxide from the atmosphere as a reactant. If the rate of photosynthesis significantly increased, carbon dioxide levels in the atmosphere would decrease.
Oxygen levels would increase: As mentioned earlier, photosynthesis produces oxygen as a byproduct. If the rate of photosynthesis significantly increased, oxygen levels in the atmosphere would increase.
The plant would grow faster: Photosynthesis provides energy to the plant, which it uses to grow. If the rate of photosynthesis significantly increased, the plant would have more energy available and would be able to grow faster.
To know more about photosynthesis:
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the origin of roots from nodes
the swollen appearance of nodes
If a common plant in an ecosystem becomes diseased, the ecosystem may become unbalanced.
Abiotic factors include decomposers such as fungi and bacteria.
Tundras have a high diversity of species.
Answer: if a common plant is in an ecosystem becomes diseased the ecosystem may become unbalanced.
Explanation:
B) unless environmental conditions change.
C) regardless of emigration and immigration.
D) even though the birth rate exceeds the death rate.
Answer: B) unless environmental conditions change.
Explanation:
The carrying capacity of an ecosystem can be defined as the maximum size of the members of the population of a species which an ecosystem can support in terms of availability of resources such as water, food, shelter and mates.
The carrying capacity of any population will stay the same B) unless environmental conditions change. is the correct option this is because of the fact that environmental changes such as disaster, predation and disease can limit the population of the species but the carrying capacity of the environment will remain the same.
Answer:
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Explanation:
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