Home
Class 12
BIOLOGY
An allele is dominant if it is expressed...

An allele is dominant if it is expressed in:

A

both homozygous and heterozygous states

B

second generation

C

heterozygous combination

D

homozygous combination

Text Solution

Verified by Experts

The correct Answer is:
A
Dominant allele expresses itself both in homozygous and in heterozygous states.
Promotional Banner

Topper's Solved these Questions

  • PLANT KINGDOM

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise MCQ|107 Videos

  • RE-NEET 2020

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|90 Videos

Similar Questions

Explore conceptually related problems

An allele is recessive if it is expressed only in:

Whether an allele is dominant or recessive depends on:

What is dominace? Why are same alleles dominant and some recessive ?

Both the allels are independently expressed in

Assertion :- In Neurospora each gene either dominant or recessive express it's effect. Reason :- Neurospora contain many alleles of a gene.

In a population of 100 cats , 36 were white and 64 were black . If the black allele is dominant over white allele , what is the frequency of black allele in this population of cats ?

Assertion: In a monohybrid cross, we study two characters. Reason: In a monohybrid cross, alleles exhibit dominant recessive relationship.

An organism has a gene ' X '. Its dominant allele expresses character c - 1 while it's recessive allele expresses character c - 2 This dominant allele is completely dominant over the recessive allele . It has another gene ' y ' which in its dominant form doesn't allow any expression of gene ' x ' which of these genotypes of that organism Will produce character c - 1 ?

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-PRINCIPLES OF INHERITANCE AND VARIATION -MCQ
  1. An organism with two identical alleles for a given trait is:

    Text Solution

    |

  2. Segregation of Mendelian factors (no linkage no crossing over) occurs ...

    Text Solution

    |

  3. An allele is dominant if it is expressed in:

    Text Solution

    |

  4. One gene pair hides the effect of another. The pheomenon is:

    Text Solution

    |

  5. RR (red) Antirrhinum majus is crossed with white (rr) one. Offsprings ...

    Text Solution

    |

  6. The allele which is unable to express its effect in the presence of an...

    Text Solution

    |

  7. The contrasting pairs of factors in Mendelian crosses are called

    Text Solution

    |

  8. First geneticist/father of genetics was

    Text Solution

    |

  9. Mendel's last law is

    Text Solution

    |

  10. A dihybrid condition is

    Text Solution

    |

  11. A colour blind girl is rare because she will be only when :

    Text Solution

    |

  12. Blue eye colour is recessive to brown eye colour. A brown eyed man who...

    Text Solution

    |

  13. Multiple alleles control inheritance of

    Text Solution

    |

  14. Which one is a hereditary disease?

    Text Solution

    |

  15. Haemophilia is more common in males because it is a

    Text Solution

    |

  16. Both husband and wife have normal vision though their father were colo...

    Text Solution

    |

  17. In Down 's syndrome of a male child , the sex complement is

    Text Solution

    |

  18. When an albino female plnt of maize is crossed with normal green male ...

    Text Solution

    |

  19. Two linked genes a nad b show 20% recombination the indivsuls of a hyb...

    Text Solution

    |

  20. Diploid chromosome number in humans is :

    Text Solution

    |