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प्रश्न
Name a disorder a human suffers from as a result of the monosomy of the sex chromosome. Give the karyotype and write the symptoms.
उत्तर
Turner's Syndrome is a result of the monosomy of the sex chromosome in humans.
Its karyotype is XO i.e. 45 chromosomes.
Symptoms -
- short stature
- lack of the development of the ovaries
- lack of secondary sexual characteristics
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संबंधित प्रश्न
If only one 'X' chromosome is found in a female person, which of the following symptoms she will show?
- epicanthal skin fold
- webbing of neck
- small testis and absence of spermatogenesis
- presence of simian crease on the palm
Give an example of an autosomal recessive trait in humans. Explain its pattern of inheritance with the help of a cross.
Identify 'a', 'b', 'c',’d’, 'e' and 'f' in the table given below:
| No. | Syndrome | Cause | Characteristics of affected individuals | Sex Male/Female/Both |
| 1. | Down's | Trisomy of 21 | 'a' (i) (ii) |
'b' |
| 2. | 'c' | XXY | Overall masculine development. |
'd' |
| 3. | Turner's | 45 with XO | 'e' (i) (ii) |
'f' |
Answer the following question.
Both Haemophilia and Thalessemia are blood-related disorders in humans. Write their causes and the difference between the two. Name the category of genetic disorder they both come under.
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 |
Identify the genetic disorder m which an individual has an overall masculine development, gynaecomastia and is sterile.
A woman with albinic father marries an albinic man. The proportion of her progeny is ______.
Females with Turner’s syndrome have ______.
“Genes contain the information that is required to express a particular trait.” Explain.
Select the correct match.
