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Solution - Genetic Disorders - Mendelian Disorders

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Question

What will be the phenotype of progeny, if a carrier haemophilic female marries a normal male?

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A colour-blind child is born to a normal couple. Work out a cross to show how it is possible. Mention the sex of this child.

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(a) Why are colour-blindness and thalassaemia categorised as Mendelian disorders? Write the symptoms of these diseases seen in people suffering from them.

(b) About 8% of human male population suffers from colour-blindness, whereas only about 0.4% of human female population suffers from this disease. Write an explanation to show how it is possible.

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A child suffering from Thalassemia is born to a normal couple. But the mother is being blamed by the family for delivering a sick baby. (5)

(a) What is Thalassemia?

(b) How would you counsel the family not to blame the mother for delivering a child suffering from this disease? Explain.

(c) List the values your counselling can propagate in the families.

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Given below is the representation of amino acid composition not the relevant translated portion of β-chain of haemoglobin, related to the shape of human red blood cells

(a) Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer.

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Give any 'two' names of X-linked diseases

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Solution for concept: Genetic Disorders - Mendelian Disorders. For the course 12th HSC Science (General)
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