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प्रश्न
Describe Klinefelter’s syndrome.
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उत्तर
- It is a chromosomal disorder caused by 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 in the formation of the ovum.
- Such an individual is male and has overall masculine development. The voice pitch is harsh and has underdeveloped testis. They are tall with long arms, showing feminine development. Voice pitch is harsh and have under developed testis.
- They are tall with long arms, showing feminine development and no spermatogenesis; therefore, individuals are sterile.
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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
What will be the phenotype of progeny, if a carrier haemophilic female marries a normal male?
Read the following statements and select the correct option.
i. Genetic disorders are broadly categorised as, Mendelian disorders and chromosomal disorders.
ii. Mendelian disorders are caused due to absence or excess of one or more chromosomes or their abnormal arrangement.
iii. Chromosomal disorders are mainly caused due to alteration or mutation in the gene.
Down’s syndrome is due to ______.
Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as ______.
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?
In Down's syndrome, karyotyping has shown that the disorder is associated with trisomy of chromosome number 21 usually due to ______.
Give the genotype of Klinefelter’s syndrome.
What is the genotype of Turner's Syndrome?
What are chromosomal disorders?
