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How is Down's syndrome produced?...

How is Down's syndrome produced?

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It is due to trisomy of 21st chromosome that the number is 47.
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MODERN PUBLICATION-PRINCIPLES OF INHERITANCE AND VARIATION-REVISION EXERCISES (SHORT ANSWER TYPE-I(A. QUESTIONS FROM STATE BOARD EXAMINATIONS))
  1. Name two sex linked diseases.

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  2. How did Mendel make sure that the pea plants were true breeding?

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  3. How is Down's syndrome produced?

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  4. Define the term co-dominance with one example.

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  5. What is incomplete dominanace ?Give one example.

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  6. Who rediscovered Mendelism?

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  7. Stydy the following cross and answer the questions. (a)Write the ...

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  8. Observe the figures and answer the questions. (a)Identify the sy...

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  9. Write the cuase and two symptoms of Klinefelter's syndrome.

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  10. What are multiple alleles?Give one example.

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  11. Differentiate between back cross and test cross.

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  12. What are point mutations?Give one example of point mutations

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  13. Differentiate between homozygous and heterozygous organisms.

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  14. What is pleiotropy ?Give one example?

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  15. What is sex-determination?Explain XX and XY type of sex determination.

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  16. What is back cross?Explain with example.

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  17. What is co-dominance ?Explain it by citing a suitable example.

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  18. Examine the following fragment of beta globin chain in human haemoglob...

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  19. What do you mean by pleiotropy ?Give example.

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  20. Distinguish between homozygous and heterozygous.

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