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प्रश्न
Describe Turner's syndrome.
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उत्तर
- Turner's syndrome is a sex chromosomal disorder caused by the non-disjunction of chromosomes during the formation of an egg.
- The individual born with Turner’s syndrome has 44 autosomes with XO. They are phenotypically female.
- They have short stature (height) and a webbed neck, a lower posterior hairline, a broad shield-shaped chest, poorly developed ovaries and breasts, and low intelligence.
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संबंधित प्रश्न
State any two symptoms of Down’s syndrome.
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.
Very Short Answer Question.
Give an example of a chromosomal disorder caused due to nondisjunction of autosomes.
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.
Match Column I with Column II and select the correct option:
| Column I | Column II | ||
| p. | Pleiotropy | I. | More than two alleles occur at the same locus on homologous chromosomes |
| q. | Multiple alleles | II. | Expression of both the alleles m heterozygous condition |
| r. | Polygenic | III. | Multiple effect of single gene |
| s. | Co-dominance | IV. | Single phenotypic character influenced by more than two genes |
Conditions of a karyotype 2n ± 1 and 2n ± 2 are called ______.
In sickle-cell anaemia, shape of RBCs under oxygen tension becomes ______.
The person with Turner’s syndrome has ______.
Select the disease which is caused by recessive autosomal genes when present in homozygous conditions.
Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as ______.
