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प्रश्न
What is the reason for the 21st trisomy?
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उत्तर
21st Trisomy occurs due to non-disjunction or failure of separation of chromosomes (autosomes) during gamete formation.
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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?
In which of the following disorders number of chromosomes present is 47?
(A) Turner’s syndrome
(B) Cushing’s syndrome
(C) Acquired Immuno - Deficiency Syndrome
(D) Down’s syndrome
Identify the characteristics that are observed in an individual suffering from Klinefelter syndrome.
i. Gynaecomastia, under developed testis and no spermatogenesis.
ii. Voice pitch is harsh.
iii. They are tall with long arms.
Identify the disease caused by an autosomal primary non-disjunction.
A woman with albinic father marries an albinic man. The proportion of her progeny is ______.
In sickle-cell anaemia, shape of RBCs under oxygen tension becomes ______.
Clotting of blood is to ______.
The technique exployed in human genetic counselling is:
Why is thalassemia cotegorised as a Mendelian disorder? Write the symptoms and explain the causes of the disease. How does it differ from Sickle cell anaemia?
Which of the following is an example of a chromosomal disorder?
