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प्रश्न
What are chromosomal disorders?
उत्तर
Chromosomal disorders are a type of genetic disorder where the abnormality is in the chromosomes themselves, either due to an incorrect number of chromosomes or a structural abnormality in one or more chromosomes. This can lead to various developmental and health issues.
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संबंधित प्रश्न
Give any 'two' names of X-linked diseases
(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.
Give an example of a human disorder that is caused due to a single gene mutation.
Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies for his experiments? State any three reasons.
Match the column-I with column-II and re-write the matching pairs.
| Column-I | Column-II |
| 1. 21 trisomy | a. Turner’s syndrome |
| 2. X-monosomy | b. Klinefelter’s syndrome |
| 3. Holandric traits | c. Down's syndrome |
| 4. Feminized male | d. Hypertrichosis |
In Klinefelter syndrome, an extra chromosome is a result of non-disjunction of X-chromosome during ____________.
A short stature with webbing of neck and low posterior hairline indicates ______ syndrome.
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
Select the disease which is caused by recessive autosomal genes when present in homozygous conditions.
Why is thalassemia cotegorised as a Mendelian disorder? Write the symptoms and explain the causes of the disease. How does it differ from Sickle cell anaemia?
