Briefly describe each of the commonly occurring mutations of haemoglobin (thalassemia and sickle cell) and how these affect haemoglobin production and function.
Question
Briefly describe each of the commonly occurring mutations of haemoglobin (thalassemia and sickle cell) and how these affect haemoglobin production and function.
Solution
Thalassemia and Sickle Cell are two common types of hemoglobin mutations.
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Thalassemia: This is a blood disorder that reduces the production of hemoglobin. Hemoglobin is the iron-containing protein in red blood cells that carries oxygen to cells throughout the body. In people with thalassemia, low levels of hemoglobin lead to a lack of oxygen in many parts of the body. There are two main types of thalassemia, alpha and beta, named after parts of the hemoglobin molecule. Mutations in the genes that produce these parts can lead to reduced production, causing the symptoms of thalassemia.
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Sickle Cell: This is a severe hereditary form of anemia in which a mutated form of hemoglobin distorts the red blood cells into a crescent shape at low oxygen levels. The mutation in the HBB gene causes the hemoglobin to deform the red blood cells when they release their oxygen load, causing them to take on a 'sickle' shape. These sickle-shaped cells are less flexible than normal red blood cells, which can lead to blockages in the blood vessels and a reduced ability for the blood to carry oxygen around the body.
In both cases, the mutations affect the production and function of hemoglobin, leading to a reduced ability for the blood to carry and deliver oxygen. This can lead to a range of symptoms, including fatigue, weakness, shortness of breath, and more severe complications.
Similar Questions
make 10 difficult MCQ questions with answers at the end based on this learning points Briefly describe each of the commonly occurring mutations of haemoglobin (thalassemia and sickle cell) and how these affect haemoglobin production and function.
Hemoglobinopathies: Describe the mutation that causes Sickle Cell disease to affect the ability of Hb to function? Describe the mutation responsible for causing instability which affects the ability of Hb to function? Describe the mutation that causes Methemoglobin to affect the ability of Hb to function?
In Sickle-Cell disease is caused by a mutation in a gene that codes for one of the protein's subunits. Which one of the following statements about this disease is correct?Group of answer choicesThe mutation is due to a silent mutation within the alpha subunit that changes an electrically charged amino acid to another electrically charged amino acid.acid.The mutation is due to a missense mutation within the beta subunit that changes an electrically charged amino acid to a nonpolar amino acid.The mutation is due to a missense mutation within the alpha subunit that changes an electrically charged amino acid to a nonpolar amino acid.The mutation is due to a silent mutation within the beta subunit that changes an electrically charged amino acid to another electrically charged amino.
Sickle cell anemia is caused by a allele because this mutation has more than one effect on the phenotype.
Bonus question: Can anyone explain how the shape of red blood cells differs in people with sickle cell anemia? What complications does this cause?
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