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The phenotypic ratio in the F2 generatio...

The phenotypic ratio in the `F_2` generation of dihybrid cross is :

A

`9:3:3:1`

B

`1:2:2:4:1:2:1:2:1`

C

`7:1:1:7`

D

`12:8:4`

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The correct Answer is:
A
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USHA PUBLICATION-HEREDITY & VARIATION -EXERCISE
  1. A true breeding plant producing red flowrs is crossed with a pure plan...

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  2. Test cross is a cross between :

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  3. The phenotypic ratio in the F2 generation of dihybrid cross is :

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  4. Grain colour in wheat is determined by three pairs of polygene . Follo...

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  5. Which of the following genes show the heterozygous condition ?

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  6. A dihybrid for qualitative trait is crossed with homozygous recessive ...

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  7. Which of the following is best suited for codominance ?

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  8. When a dihybrid cross is fit into a punnett square with 16 boxes , the...

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  9. In guinea pigs , black short hair ( BBSS ) is dominant over white long...

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  10. A pure tall and a pure dwarf plant were crossed to produced offsprings...

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  11. If AAbb xx aaBB , then phenotypic ratio of its progeny will be :

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  12. The experimental plant material used by Mendel was :

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  13. In pea plants , yellow seeds are dominant to green . If a heterozygous...

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  14. In a given plant , red colour ( R ) of fruits is dominant over white f...

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  15. Which of the following characters is not among the seven characters co...

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  16. When a tall plant with round seeds ( TTRR ) crossed with a dwarf plant...

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  17. When a cross is conducted between black feathered hen and a white feat...

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  18. A plant of F1 - generation has genotype ‘AABbCC’ . On selfing of this ...

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  19. In a monohybrid cross involving incomplete dominance , the phenotypic ...

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  20. How many different kinds of gametes will be produced by a plant having...

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