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Select the incorrect statement about Dow...

Select the incorrect statement about Down's sysdrome.

A

It is caused by nondisjunectionof autosomes during oogenesis

B

Late pregnancy in woman might be the cause of Dwon's syndrome

C

Affected individuals exhibit 21st trisomy condition

D

A woman with Down's syndrome always give birth to childrne with Donw's syndrome

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The correct Answer is:
D
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AAKASH SERIES-PRINCIPLES OF INHERITANCE AND VARIATION-EXERCISE-I (Sex determination & Genetic Disorders)
  1. Genes limited to only one sex are

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  2. Read the statements about honey bees I. Daughters of a Queen bee sha...

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  3. In Drosophila, sex is determined by the ratio of X-chromosomes, to the...

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  4. Honey bees development by arrhenotoky are

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  5. A normal visioned girl has a normal visioned brother and a colour blin...

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  6. X/A ratio fo a drosophila with largge size, morophological abnormaliti...

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  7. AXX sperms are formed due to

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  8. Which of the following is not applicable to sickle cell anaemia?

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  9. Sex of the offspring depends on the fertilizing ovum in

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  10. Idenfity the incorrect statement about XY-linked genes

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  11. The codon of m-RNA which determins aminoacid at the 6th position in po...

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  12. Identify the incorrect statement about alpha thalassemia

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  13. Which of the following is not a character of Turner'sydrome?

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  14. Select the incorrect statement about Down's sysdrome.

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  15. Identify the trait inherited in the given pedigree from the following ...

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  16. Study the above pedigree of an autosomal recessive disorder and identi...

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  17. In humans the above pedigree indicates the inheritance of

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  18. The given pedigree shows inheritance of

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  19. Incorrect match from the following about the disease causing genes and...

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  20. Which of the following disorders are caused by the conditin monosomy?

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