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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
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?
Give an example of an autosomal recessive trait in humans. Explain its pattern of inheritance with the help of a cross.
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.
What do sex linked traits appear in males than in females?
A male rabbit of genotype 'AABBDDEE' is crossed with a female rabbit of genotype 'aabbddee' to produce F1 hybrid offspring. How many genetically different gametes can be produced by this F1 hybrid?
Conditions of a karyotype 2n ± 1 and 2n ± 2 are called ______.
In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine?
Sickle cell anaemia is ______.
It is well known that Queen Victoria of England was a carrier for haemophilia. Since this is an X-linked disease, it can be predicted that ______.
If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
