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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.
उत्तर
An additional copy of chromosome number 21 (trisomy of 21) leads to Down's syndrome. The affected individual will have:
(i) short statured with small round head
(ii) furrowed tongue
(iii) partially open mouth
(iv) broad palm with characteristic palm crease
(v) retarded physical, psychomotor and mental development
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संबंधित प्रश्न
What is the reason for the 21st trisomy?
Write a note on Down’s syndrome.
Feminised males have ______ chromosomes.
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Identify the correct statement from the following.
Following list indicates various genetic diseases. Identify the diseases that are not caused due to single gene defect.
Huntington's chorea, alkaptonuria, Sickle cell anaemia, Down syndrome, thalassemia, Taysachs disease, Turner syndrome, cystic fibrosis, haemophi Lia, Klinefelter syndrome, albinism
HbA and HbS alleles of normal and sickle celled RBC are ______.
It is well known that Queen Victoria of England was a carrier for haemophilia. Since this is an X-linked disease, it can be predicted that ______.
Trisomy is represented by ______.
It is said, that the harmful alleles get eliminated from population over a period of time, yet sickle cell anaemia is persisting in human population. Why?
Describe Turner's syndrome.
