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प्रश्न
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’ |
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उत्तर
| No | Syndrome | Cause | Characteristics of affected individuals |
Sex/Male/Femal e/Both |
| 1. | Down’s | Trisomy of 21 |
(i) Broad forehead (ii) Permanently open mouth, protruding and furrowed tongue and projecting lower lip. |
Both |
| 2. | Klinefelter’s | XXY | Overall masculine development | Male |
| 3. | Turner’s | 45 with XO |
(i) Poorly developed ovaries, webbed neck, broad chest with under developed breasts and below average intelligence. (ii) Body hair absent |
Female |
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संबंधित प्रश्न
Given below is the representation of amino acid composition not the relevant translated portion of β-chain of haemoglobin, related to the shape of human red blood cells
(a) Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer.
(b) What difference would be noticed in the phenotype of the normal and the sufferer related to this gene?
(c) Who are likely to suffer more from the defect related to the gene represented the males, the females or both males and females equally? And why?
What is ‘syndrome’?
Attempt any TWO of the following:
‘The gene for sickle cell anaemia in homozygous condition is lethal and produces sickle cell trait in heterozygous carrier’. Explain.
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.
Following list indicates various genetic diseases. Identify the diseases that are not caused due to single gene defect.
Huntington's chorea, alkaptonuria, Sickle cell anaemia, Down syndrome, thalassemia, Taysachs disease, Turner syndrome, cystic fibrosis, haemophi Lia, Klinefelter syndrome, albinism
The person with Turner’s syndrome has ______.
Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as ______.
Short stature in females, webbed neck absence of menstrual cycle and sterility are characteristics which of the following disease?
Give definition of non-disjunction.
What is the genotype of Turner's Syndrome?
