- Mendelian Disorders in Humans - Thalassemia
- Haemophilia,Sickle-cell anaemia,Phenylketonuria
- Sex Linked Inheritance - Haemophilia and Colour Blindness
- Genetic Disorders - Mendelian Disorders
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.
(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.
Why is pedigree analysis done in the study of human genetics? State the conclusions that can be drawn from it.
Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies for his experiments? State any three reasons.
(a) Why are thalassemia and haemophilia categorized as Mendelian disorders? Write the symptoms of these diseases. Explain their pattern of inheritance in humans.
(b) Write the genotypes of the normal parents producing a haemophilic son.
Why are color-blindness and thalassaemia categorised as Mendelian disorders? Write the symptoms of these diseases seen in people suffering from them.
About 8% of the human male population suffers from colour blindness, whereas only about 0.4% of the human female population suffers from this disease. Write an explanation to show how it is possible.
A couple with normal vision bear a colour blind child. Work out a cross to show how it is possible and mention the sex of the affected child.