The type of mutation that causes sickle cell anemia is called a point mutation.
A point mutation in both copies of the HBB gene results in the hereditary illness sickle cell disease (SCD).
An element of hemoglobin, the protein in red blood cells that carries oxygen, is encoded by this gene. Because of the mutation, hemoglobin molecules clump together to form red blood cells with a sickle shape.
About 100,000 people in the US have the rare disease sickle cell anemia. It primarily affects persons who have ancestors in regions of the world where malaria is common and who also have a gene that offers some protection against anemia. Additionally, this gene causes sickle cell anemia.
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Answer:
Depending on which kind of bacteria you are talking about like flesh eating bacteria is located in the ocean, in the warmer waters in the Southeast and the Gulf of Mexico.
Explanation:
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The valve between the right atrium and right ventricle is the tricuspid valve, which helps prevent backflow of blood.
Therefore , the correct answer is (b).
The valve that is located between the right atrium and the right ventricle of the heart is referred to as the tricuspid valve. This valve's job is to prevent the backflow of blood into the right atrium when the right ventricle contracts. The tricuspid valve has three flaps or cusps, which is where its name comes from. The other options listed, such as the bicuspid, aortic and pulmonary valves, are located in other parts of the heart.Therefore , the correct answer is (b).
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Three environmental factors that could cause certain neurologist conditions:
- Radiation: This may produce Cancer in the brain, making it spread.
- Genetic Mutation: This has many symptoms, it can cause autism, Down syndrome, strokes etc.)
- A lot of Drugs/Alcohol: This may cause long term diseases, delirium, and dementia.
Is it okay?
Answer:
Three environmental factors can be:
1.Ionizing radiation: cancer in the bone marrow or stomach
2.Solar radiation: skin cancer
3. Electromagnetic fields: induction of cataracts of the eyes.
Explanation:
1. Radiation sickness occurs when exposed to very high doses of ionizing radiation. It may be acute or chronic. The risk for cancer is dose dependent and an accumulation effect begins if the doses are very low.
2. Skin cancer is malignant that is caused by the uncontrolled division and growth of skin cells, with the ability to invade healthy tissues.
3. The thermal effects of electromagnetic fields produced by radar waves include the increase in body temperature by more than 1ยบ C. Its effects include the cataracts of the eyes, and physiological and thermo-regulatory responses as the body temperature increases .
B- an interest in learning about the native cultures of immigrants
C- a regional policy of maintaining traditional economic systems
D- a practice in most factories of hiring only native-born Americans
The correct answer is:
A- a policy favoring native-born Americans over immigrants
Explanation:
Nativism is the executive position of processing status for several organized inhabitants of a nation as contrasted to requirements of newcomers or aliens. It is characterized by opposition to immigration based on fears that the emigrants will deteriorate or spoil surviving cultural importance.
A) they must be fertile
B) they must be dominant
C) they must be viable
D) they must be unique
E) they must be sterile