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What would be the genotype of : (i) An...

What would be the genotype of :
(i) An individual who is carrier of sickle cell anaemia gene but apparently unaffected .
(ii) An individual affected with the disease .

A

(i) `Hb^AHb^S`
(ii) `Hb^A Hb^S`

B

(i) `Hb^AHb^S`
(ii) `Hb^S Hb^S`

C

(i) `Hb^SHb^S`
(ii) `Hb^A Hb^S`

D

(i) `Hb^AHb^A`
(ii) `Hb^A Hb^S`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the genotypes of individuals related to sickle cell anemia, we need to understand the genetics behind this condition. ### Step-by-Step Solution: 1. **Understanding Sickle Cell Anemia**: - Sickle cell anemia is a genetic disorder caused by a mutation in the hemoglobin gene. It is inherited in an autosomal recessive manner. - The two alleles involved are HbA (normal hemoglobin) and HbS (sickle cell hemoglobin). 2. **Genotypes**: - There are three possible genotypes for individuals concerning sickle cell anemia: - **HbAA**: Homozygous normal (not affected). - **HbAS**: Heterozygous (carrier, but not affected). - **HbSS**: Homozygous sickle cell (affected). 3. **(i) Carrier Individual**: - An individual who is a carrier of the sickle cell anemia gene but is apparently unaffected would have the genotype **HbAS**. This means they have one normal allele (HbA) and one sickle cell allele (HbS). They do not exhibit symptoms of the disease but can pass the sickle cell allele to their offspring. 4. **(ii) Affected Individual**: - An individual affected by sickle cell anemia would have the genotype **HbSS**. This means they have two copies of the sickle cell allele and will exhibit the symptoms of the disease. ### Final Answer: - (i) The genotype of an individual who is a carrier of sickle cell anemia gene but apparently unaffected is **HbAS**. - (ii) The genotype of an individual affected with the disease is **HbSS**.
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Write the genotype of (i) an individual who is carrier of sickle cell anaemia gene but apparently unaffected, and (ii) an individual affected with the disease.

Which of the following genotype will show the diseased condition in sickle cell anaemia?

Sickle cell anemia is a genetic disorder where the body produces an abnormal hemoglobin called hemoglobin S. Red blood cells are normally flexible and round, but when the hemoglobin is defective, blood cells take on a “sickle” or crescent shape. Sickle cell anemia is caused by mutations in a gene called HBB. It is an inherited blood disorder that occurs if both the maternal and paternal copies of the HBB gene are defective. In other words, if an individual receives just one copy of the defective HBB gene, either from mother or father, then the individual has no sickle cell anemia but has what is called “sickle cell trait”. People with sickle cell trait usually do not have any symptoms or problems but they can pass the mutated gene onto their children. There are three inheritance scenarios that can lead to a child having sickle cell anemia: - Both parents have sickle cell trait - One parent has sickle cell anemia and the other has sickle cell trait - Both parents have sickle cell anemia If one parent has sickle cell anemia and the other has sickle cell trait, there is __________that their children will have sickle cell anemia and ___________will have sickle cell trait.

Sickle cell anemia is a genetic disorder where the body produces an abnormal hemoglobin called hemoglobin S. Red blood cells are normally flexible and round, but when the hemoglobin is defective, blood cells take on a “sickle” or crescent shape. Sickle cell anemia is caused by mutations in a gene called HBB. It is an inherited blood disorder that occurs if both the maternal and paternal copies of the HBB gene are defective. In other words, if an individual receives just one copy of the defective HBB gene, either from mother or father, then the individual has no sickle cell anemia but has what is called “sickle cell trait”. People with sickle cell trait usually do not have any symptoms or problems but they can pass the mutated gene onto their children. There are three inheritance scenarios that can lead to a child having sickle cell anemia: - Both parents have sickle cell trait - One parent has sickle cell anemia and the other has sickle cell trait - Both parents have sickle cell anemia Sickle cell anemia is a/ an ______________________ disease.

Sickle cell anemia is a genetic disorder where the body produces an abnormal hemoglobin called hemoglobin S. Red blood cells are normally flexible and round, but when the hemoglobin is defective, blood cells take on a “sickle” or crescent shape. Sickle cell anemia is caused by mutations in a gene called HBB. It is an inherited blood disorder that occurs if both the maternal and paternal copies of the HBB gene are defective. In other words, if an individual receives just one copy of the defective HBB gene, either from mother or father, then the individual has no sickle cell anemia but has what is called “sickle cell trait”. People with sickle cell trait usually do not have any symptoms or problems but they can pass the mutated gene onto their children. There are three inheritance scenarios that can lead to a child having sickle cell anemia: - Both parents have sickle cell trait - One parent has sickle cell anemia and the other has sickle cell trait - Both parents have sickle cell anemia If both parents have sickle cell trait, then there is _______________of the child having sickle cell anemia.

Sickle cell anemia is a genetic disorder where the body produces an abnormal hemoglobin called hemoglobin S. Red blood cells are normally flexible and round, but when the hemoglobin is defective, blood cells take on a “sickle” or crescent shape. Sickle cell anemia is caused by mutations in a gene called HBB. It is an inherited blood disorder that occurs if both the maternal and paternal copies of the HBB gene are defective. In other words, if an individual receives just one copy of the defective HBB gene, either from mother or father, then the individual has no sickle cell anemia but has what is called “sickle cell trait”. People with sickle cell trait usually do not have any symptoms or problems but they can pass the mutated gene onto their children. There are three inheritance scenarios that can lead to a child having sickle cell anemia: - Both parents have sickle cell trait - One parent has sickle cell anemia and the other has sickle cell trait - Both parents have sickle cell anemia If both parents have sickle cell trait, then there is _______________of the child having sickle cell trait.

Study the given pedigree chart showing the pattern of blood group inheritance in a family (a) Given the genotype of the following: (i)Parents (ii) The individual 'X' in second generation (b) State the possible blood groups of the individual 'Y' in third generation (c) How does the inheritance of this blood group explain codominance?

Select the statements that describe characteristics of genes : (i) genes are specific sequence of bases in a DNA molecule (ii) a gene does not code for proteins (iii) in individuals of a given species, a specific gene is located on a particular chromosome (iv) each chromosome has only one gene

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