Home
Class 12
BIOLOGY
When a cross is conducted between black ...

When a cross is conducted between black feathered hen and a white feathered cock , blue feathered fowls are formed . When these fowls are allowed for interbreeding , in `F_1` -generation , there are 20 blue fowls . What would be the number of black and white fowls .

A

Black 20 , white 10

B

Black 20 , white 20

C

Black 10 , white 10

D

Black 10 , white 20

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • HEALTH &DISEASE

    USHA PUBLICATION|Exercise EXERCISE|73 Videos

  • HUMAN REPRODUCTION

    USHA PUBLICATION|Exercise EXERCISE|173 Videos

Similar Questions

Explore conceptually related problems

A cross between two pure forms of black feathered and white feathered fowl resutled in F_1 hybrid with blue featherd one. Under which type can this be placed?

The allele for pea comb (P) in chickens is completely dominant to the allele for single comb (p) . The alleles for black feather colour (B), and white feather colour (B') show codominance, so that BB' individuals possess blue feathers. If chickens heterozygous for both pairs of genes are mated what proportion of offspring are expected to be pea combed and white feathered ?

Andalusian fowls have two pure forms - black and white. If black forms (BB) and white forms (WW) are crossed F_(1) individuals appear blue coloured (BW), due to incomplete dominance. Which of the following would be an outcome of a cross between black form and blue form ?

USHA PUBLICATION-HEREDITY & VARIATION -EXERCISE
  1. Which of the following characters is not among the seven characters co...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  7. When tall and dwarf plants are crossed , from which cross 1 : 1 ratio ...

    Text Solution

    |

  8. In Mirabilis , a hybrid for red ( RR ) and white ( rr ) flower produce...

    Text Solution

    |

  9. Ratio of progeny , when a red coloured heterozygote is crossed with a ...

    Text Solution

    |

  10. Two pea plants were subjected for cross pollination . Of the 183 plant...

    Text Solution

    |

  11. The total number of progeny obtained from a dihybrid cross is 1280 in ...

    Text Solution

    |

  12. What type of gametes will form by genotype RrYy ?

    Text Solution

    |

  13. Pure tall plants are crossed with pure dwarf plants . In the F1 - gene...

    Text Solution

    |

  14. The term linkage was coined by

    Text Solution

    |

  15. Crossing over is advantageous because it brings about

    Text Solution

    |

  16. Law of Mendel , which is not completely applicable is ?

    Text Solution

    |

  17. If a plant having yellow and round seeds was crossed with another plan...

    Text Solution

    |

  18. The 1 : 2 : 1 ratio with the pink flower in the F2 generation indicate...

    Text Solution

    |

  19. Probability of genotype TTrr in F2 - generation of a dihybrid cross is...

    Text Solution

    |

  20. Which one of the following was rediscoverer of Mendel's work :

    Text Solution

    |