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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
APPEARS IN
संबंधित प्रश्न
Attempt any TWO of the following:
‘The gene for sickle cell anaemia in homozygous condition is lethal and produces sickle cell trait in heterozygous carrier’. Explain.
What do sex linked traits appear in males than in females?
Mention the symptoms of Phenylketonuria.
Match the Column I and Column II and select the correct option.
| List-I | List-II | ||
| i. | Holandric genes | a. | Pleiotropy |
| ii. | Multiple effects of a single gene | b. | Hypertrichosis |
| iii. | Skin colour in man | c. | Multiple Alleles |
| iv. | ABO Blood types | d. | Polygenic inheritance |
The correct answer is
Clotting of blood is to ______.
Identify chromosomal disorder caused due to non-disjunction of the 21st number of chromosomes and enlist its symptoms.
Select the correct match.
Give the genotype of Klinefelter’s syndrome.
What is the genotype of Turner's Syndrome?
Match the disorder in column I with their nature in column II.
| Column I | Column II | ||
| i. | Thalassemia | a. | X monosomy |
| ii. | Turner’s syndrome | b. | Extra X chromosomes in male |
| iii. | Klinefelter’s syndrome | c. | 21st Trisomy |
| iv. | Down’s syndrome | d. | Mendelian disorder |
