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Lana71 [14]
3 years ago
14

Which statements correctly describe mutations in gametes and mutations in somatic cells?

Biology
1 answer:
ASHA 777 [7]3 years ago
7 0

A mutation is a rare, accidental or induced modification of genetic information (DNA or RNA sequence) in the genome.


The consequences of a mutation vary according to the part of the genome affected. A mutation is said to be hereditary if the mutated genetic sequence is passed on to the next generation.

In multicellular animals, germline mutations can be transmitted to offspring, whereas somatic mutations do.


Somatic mutations do not affect cells intended for reproduction, so they are never hereditary:

* Post-zygotic mutations are the mutations that appear in the egg after fertilization. They are rarer and are expressed as mosaic in the individual concerned (the mutation will be present only in the daughter cells originating from the mutated embryonic cell).

* Mutations can appear throughout life on the DNA of any cell; they are then transmitted to the line of the daughter cells. These can, in some cases, become tumor cells and then form cancer.

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Why is a viruses refered to as a particles rather than cells
noname [10]
Viruses are not alive. Although they sort of “hack” a host’s cells and reproduce, they do not breathe or move on their own. A virus will sit on a counter forever if it’s untouched. Viruses are spread by physical contact, not because they can move around on their own.
Although viruses can attack and hack, and use your cells to reproduce, they are programmed to do so.
Cells are very much alive, while viruses are not.
5 0
3 years ago
Sarah recently learned that O2 is found in the Earth’s water bodies. She was amazed to know the proportion of O2 found in the oc
Mamont248 [21]

It has been found that the rainforests are accountable for about one-third, that is, 28 percent of the oxygen of the Earth, however, the majority of the oxygen, that is, about 70 percent in the atmosphere is generated by the marine plants. The left-over two percent of the oxygen comes from other sources.  

The majority of the oxygen comes from the tiny plants in the ocean known as phytoplankton, which lives near the surface of the water and drifts with the currents. Similarly to plants, they perform the process of photosynthesis, that is, they utilize carbon dioxide and sunlight to prepare food, oxygen is the by-product of photosynthesis.  

However, the concentration of the dissolved oxygen, which the water can hold relies on the salinity and temperature of the water. The cold water can withhold more oxygen in comparison to warm water and fresh water can hold more oxygen in comparison to salt water. So, the warmer and saltier the water is, the less will be the oxygen dissolved in it.  


7 0
3 years ago
Which of the following are cells formed by meiosis?
loris [4]

Answer:

C

Explanation:

Meiosis is the creation of sex cells so it isn't A or B. Meiosis makes two different gametes that are not identical so it has to be C

6 0
2 years ago
Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to body tissues. People with hemoglobin levels les
Pani-rosa [81]

Answer:The Null hypothesis state that the mean hemoglobin level for all the children in Jordan is 12g/dl.

While the Alternative Hypothesis state that the mean hemoglobin level for all the children in Jordan is less than 12g/dl

Explanation:

The Null hypothesis H0: This is the hypothesis that state that there is no statistical difference between the two variables in the hypothesis. It is the hypothesis that the researcher is work to nullify.

The Alternative hypothesis H1: This is the hypothesis that states there is a statistically difference between two variables.

6 0
3 years ago
Post-transcriptional regulation includes all of the following mechanisms EXCEPT:RNA interference - anti-mRNA sequences bind to m
Usimov [2.4K]

Answer:

D) presence of transcription activators or repressors

Explanation:

The reason why this is not post-transcriptional regulation is that activators actually start the process of transcription by binding to specific sites. while on contrary when repressor binds it halt the process.

For example, there is a protein called CAP which in the presence of cAMP bind with promoter region and enhances the activity of RNA polymerase . While in the absence of cAMP it can not bind to promoter hence the transcription stooped.

4 0
3 years ago
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