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Down's syndrome is caused by an extra c...

Down's syndrome is caused by an extra copy of chromosome number 21. what percentage of offspring produced by an affected mother and a normal father would be affected by this disorder ?

A

0.25

B

1

C

0.75

D

0.5

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SHARAM PUBLICATION-GENETICS & EVOLUTION(Sex Determinatin)-EXAMPLE
  1. Down's syndrome is caused by an extra copy of chromosome number 21. w...

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  2. Which type of inheritance is seen in Haeophilia / Colourblindness?

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  3. Which type of trait is generally found in sex- linked inheritance/

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  4. What are carries?

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  5. What is Klinefelter syndrome ?

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  6. Name two sex-linked diseases of human being.

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  7. Who proposed the chromosome theory of inheritance?

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  8. What is the chromosomal formula for Turner's syndrome?

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  9. How Down.s syndrome is caused?

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  10. Do the genes of the X and Y chromosomes determine only sex characteris...

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  11. In which chromosome is the gene for haemophilia located?

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  12. In which syndrome a barr body is absent?

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  13. In sickle cell haemoglobin which amino acid replaces glutamic acid?

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  14. In which syndrome the person is phenotypically male?

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  15. What is the chromosomal formula for Turner's syndrome?

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  16. Name the scientist who discovered Down.s syndrome.

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  17. What is the chromosome constitution of super females?

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  18. What the female is said to be when both the X choromosomes are carryin...

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  19. Which sex is usually a carrier?

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  20. In which chromosome, the factors for haemophilia and colour blindness ...

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  21. Sex linked character is transmitted by which chromosome?

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