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irga5000 [103]
3 years ago
15

Down syndrome is characterized by cells having three copies of chromosome 21. as a somatic cell in an individual with down syndr

ome prepares to enter mitosis, how many chromatids would be present in the cell’s nucleus?
Biology
1 answer:
jasenka [17]3 years ago
4 0
There will be 48 chromatids present
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Ecosystems include which of the following components that community do not
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Answer:

Non-living components

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Ecosystems include non-living components which are not present in the community.

An ecosystem is made up of communities including living and non - living components.

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5 0
3 years ago
The energy in fossil fuels is derived from the energy stored in plant and animal matter
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<span>The energy which we are using in today's world for our needs is fossil fuel, we used to power our home by burning coal and run our vehicle through the oil or fossil fuel, but we should know that it is limited in quantity and cannot use it once it releases energy or burned, it is created by the dead organic materials like trees and animals etc. which slowly buried in the ground as the time goes and after 1000's of years it get pressurised and rise in temperature make that organic material into fossil fuel, so that's how the fossil fuel comes in existence, which we extract from the ground by drilling deep into the ground.</span>
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3 years ago
Read 2 more answers
Perumbeti A, Higashimoto T, Urbinati F, et al. A novel human gamma-globin gene vector for genetic correction of sickle cell anem
elena-s [515]

SCA is a common monogenic blood disorder with potentially devastating consequences due to chronic and episodic disease; it has a massive impact on the health-care system and is linked to a significant reduction in life span.

We show that gene therapy with a lentivirus vector expressing γ-globin has the potential for a one-time cure and define the parameters required to cure the disease. We also show a preclinical in vivo method for determining the minimal amount of genetically corrected hematopoietic stem cells needed to correct disease, which is important in the design of clinical gene therapy trials.

The expression of the γ-globin gene in hematopoietic stem cells (HSCs) results in enough postnatal fetal hemoglobin (HbF) to correct sickle cell anemia (SCA) in the Berkeley "humanized" sickle mouse. We assessed critical parameters for correction after de-escalating the number of transduced HSCs in transplant recipients using reduced-intensity conditioning and varying gene transfer efficiency and vector copy number.

The minimal amount of HbF, F cells, HbF/F-cell, and gene-modified HSCs required for correcting the sickle phenotype was determined using a systematic quantification of functional and hematologic red blood cell (RBC) indices, organ pathology, and life span.

To learn more about sickle cell anemic from the given link

brainly.com/question/17063471

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5 0
2 years ago
Why is it necessary to give the hpv vaccine in multiple doses? the hpv vaccine contains poorly immunogenic antigenic fragments.
Kobotan [32]
<span>The answer to this question would be: the HPV vaccine does not replicate in the host
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Administering a vaccine will induce the body immune cells to recognize it and produce a specific antibody for that antigen. The vaccine can be beneficial if the titer of the antibody is above a certain level. If the level of antibody is too low, the protection will be low too. Giving vaccine multiple time will increase the titer and increase the protection. HPV vaccine is safe because it won't replicate in the host so it can be administered multiple times.
6 0
3 years ago
Which of the following statements concerning viruses is true? View Available Hint(s) Which of the following statements concernin
weqwewe [10]

Answer:

The correct answer is "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach".

Explanation:

The missing option of this question is the one that is correct, which is "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach". A virus is able to infect by recognizing particular components that are present in the surface of the host cell. If this components are absent in the cell, the virus is not able to infect it. Therefore, the "host range" is determined by the presence or absence of this particular components.

6 0
3 years ago
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