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When a single gene produces two effects ...

When a single gene produces two effects and one of it is lethal then the ratio is ...............

A

`2 : 1`

B

`1 : 1 `

C

`1 : 2 : 1`

D

`1 : 1 : 1 : 1`

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CHETANA PUBLICATION-INHERITANCE AND VARIATION-Exercise
  1. When phenotypic and genotypic ratios are the same, then it is an examp...

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  2. A pea with yellow and round seeds is crossed with another pea plant wi...

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  3. When a single gene produces two effects and one of it is lethal then t...

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  4. When two genes control a single character and have cumulative effect t...

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  5. Genes located on the same locus but show different expression,

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  6. If the centromere is situated near the end of the chromosome, the chro...

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  7. ..................... chromosome appears 'V' shaped during anaphase.

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  8. Sex- linked genes are present on ................

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  9. Sex determination in human being is .............

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  10. Colour blindness is a .........

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  11. The sister chromatids that help together at ............

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  12. Which of the following is not X-linked disorder?

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  13. Which of the follwoing is also called bleeder's disease ?

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  14. XXY Chromosomal complement is found in ......................

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  15. The person with Tuner's syndrome has ................

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  16. Webbed neck is characteristic of ..............

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  17. If genetic disease is transferred from a phenotypically normal carrier...

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  18. How many gametes will be produced by AA Bb cc genotype?

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  19. Which of the following is most appropriate for thalassemia?

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  20. Genotype of blood group 'AB' in humans is..........

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