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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
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.
In Klinefelter syndrome, an extra chromosome is a result of non-disjunction of X-chromosome during ____________.
A short stature with webbing of neck and low posterior hairline indicates ______ syndrome.
In sickle-cell anaemia, shape of RBCs under oxygen tension becomes ______.
Down’s syndrome is due to ______.
Select the incorrect statement regarding pedigree analysis.
If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
Trisomy is represented by ______.
Describe Turner's syndrome.
Which of the following is the primary cause of Mendelian disorders?
