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प्रश्न
During a medical investigation, an infant was found to possess an extra chromosome 21. Describe the symptoms the child is likely to develop later in the life.
During a medical investigation, an infant was found to possess an extra chromosome 21. Tell the symptoms of the child is likely to develop in the life.
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उत्तर
An additional copy of chromosome number 21 (trisomy of 21) leads to Down’s syndrome. The affected individual will have:
- short statured with small round head
- furrowed tongue
- partially open mouth
- broad palm with characteristic palm crease
- retarded physical, psychomotor and mental development
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संबंधित प्रश्न
Give the genotype of Turner’s syndrome.
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.
Very Short Answer Question.
Give an example of a chromosomal disorder caused due to nondisjunction of autosomes.
Write a note on Down’s syndrome.
Identify the INCORRECT statement.
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
Extra chromosome ‘X’ is present in which one of the following cases?
Read the following and answer from given below:
Turner's syndrome is an example of monosomy. It is formed by the union of an allosome-free egg and a normal 'X' containing sperm or a normal egg and an allosome-free sperm. The individual has 2n = 45 chromosomes (44 + X0) instead of 46. Such individuals are sterile females who have rudimentary ovaries, underdeveloped breasts, small uterus, short stature, webbed neck, and abnormal intelligence. They may not menstruate or ovulate. This disorder can be treated by giving female sex hormones to women from the age of puberty to make them develop breasts and have menstruation. This makes them feel more normal.
The number of Barr bodies present in a female with Turner's syndrome is ______
Why is the frequency of red-green colour blindness is many times higher in males than that in females?
Trisomy of 21st chromosome leads to a disorder ______.
