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Vinil7 [7]
3 years ago
14

When during the cell cycle do chromosomes first become visible?

Biology
1 answer:
Aleks [24]3 years ago
3 0

Answer:

chromosomes become visible during C)Prophase

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A cell biologist determines that diploid cells from a particular species of grasshopper contain 200 picograms of DNA per cell du
Pavel [41]

Answer:

The correct answer will be- 200

Explanation:

The cell cycle in eukaryotes mostly takes place in four phases: G₁, S, G₂ and M phase in sequence.

The DNA replication takes place during S phase which doubles the amount of DNA in a cell after which during M- phase the DNA divides into the daughter cell.

The amount of DNA present during G₂ phase is the 200 pg which will remain same until anaphase I as the segregation of chromosomes to the daughter cells takes place in the anaphase. Therefore, the amount of DNA observed after G₂ phase will remain 200 pg till metaphase I.

Thus, 200 is the correct answer.

3 0
3 years ago
1, based on what you know about blood, why would having a sickle cell anemia crisis result in a reduced red blood cell count, an
Alex73 [517]

1. Having a sickle cell anemia crisis is a severe condition of reduced red blood cell count.
 2. Having sickled red blood cells lead to the symptoms like having pain in the chest and the throbbing of her leg.
 3. A person having sickle cell anemia is mostly tired due to reduction in red blood cells, so they cannot do any work with their bodies. There would difference in the personal appearances like yellow eye and skin looks pale and the skeletal system become weak too. There is trouble with breath too. 
 4. The symptoms are as follows like the patient fall in to anemia condition, urine is dark in color, eyes are yellow, and person looks pale and the body experiences frequent pain and delay in the body growth.
 5. Hydroxyurea is the medication used here. The pros of this are the frequent body pains reduces and reduction in need of blood transfusion. the cons are increase of infection and this particular drug may cause tumors and leukemia.
8 0
3 years ago
In prokaryotes, functionally related genes are usually clustered in a single operon. what has been found to be the case in eukar
Andre45 [30]
Genes in eukaryotes are dispersed and not clustered onto a single operon
5 0
3 years ago
Alleles are different versions of:
eimsori [14]

Answer:

Genes

Explanation:

7 0
3 years ago
London-type smog results from the burning of what
just olya [345]
I believe its coal i hope this helped
5 0
3 years ago
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