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प्रश्न
What are the different characters that develop due to Klinefelter's syndrome?
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उत्तर
Klinefelter syndrome (XXY males):
- It is a chromosomal disorder caused due to an extra X chromosome in males. Thus genotype of individuals is 44 + XXY. They are described as feminized males.
- The extra chromosome is a result of the non-disjunction of the X-chromosome during meiosis.
- The individual is male and has overall masculine development.
- Individuals have harsh voice pitch and under developed testis.
- They are tall with long arms, feminine development (development of breast i.e. Gynaecomastia), and spermatogenesis does not occur, therefore, individuals are sterile.
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संबंधित प्रश्न
What will be the phenotype of progeny, if a carrier haemophilic female marries a normal male?
Identify ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ and ‘f’ in the table given below:
| S. No. | Syndrome | Cause | Characteristics of affected individuals | Sex (male/female/both) |
| 1. | Down’s | Trisomy of 21 |
‘a’ |
‘b’ |
| 2. | ‘c’ | XXY | Overall masculine development | ‘d’ |
| 3. | Turner’s | 45 with XO |
‘e’ |
‘f’ |
State any two symptoms of Down’s syndrome.
Feminised males have ______ chromosomes.
Identify I and II in the given diagram of chromosome.
Identify the option that correctly represents the number of chromosomes in Down syndrome.
Sickle cell anaemia is ______.
Klinefelters’ syndrome is characterised by a karyotype of ______.
If a father and son are both defective in red-green colour vision, is it likely that the son inherited the trait from his father? Comment.
In Down's syndrome, karyotyping has shown that the disorder is associated with trisomy of chromosome number 21 usually due to ______.
