Home
Class 12
BIOLOGY
In Drosophila, the sex is determined by...

In Drosophila, the sex is determined by

A

the ratio of pairs of X-chromosomes to the pairs of autosomes

B

whether the egg is fertilised or develops parthenogenetically

C

the ratio of number of X-chromosomes to the set of autosomes

D

X and Y-chromosomes

Text Solution

Verified by Experts

The correct Answer is:
A
Calvin Bridges demonstrated that in Drosophilia, the sex is detemined by ratio of the number of X-chromosomes to the sets of autosomes. According to genic balances theory of sex-determination, Y-chromosome of Drosophilia does not important for the determination of sex.
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

In Drosophila sex is determined by

Assertion In human, female sex is determined by XX chromosome Reason Male sex is determined by XY-chromosome

In humans ,sex is determined by

According to genic balance theory, which was given by CB Bridges, the sex of Drosophila is determined by

sex determination

Inbacteria, sex is determined by presence of

In Bonellia viridis , sex is determined by

In Drosophila the XXY constitution determines

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-PRINCIPLES OF INHERITANCE AND VARIATION -MCQ
  1. Which of the following discoveries resulted in a Nobel Prize

    Text Solution

    |

  2. When a cluster of genes shows linkage behaviour they

    Text Solution

    |

  3. In Drosophila, the sex is determined by

    Text Solution

    |

  4. Genes for cytoplasmic male sterility in plants are located in

    Text Solution

    |

  5. In recent years,DNA sequences (nucleotide sequence) of maternal DNA an...

    Text Solution

    |

  6. Genetic map is one that :

    Text Solution

    |

  7. There are three genes a, b, c, percentage of crossing over between a a...

    Text Solution

    |

  8. Which of the following is the example of sex-linked disease?

    Text Solution

    |

  9. Which of the following is the example of pleiotropic gene , -

    Text Solution

    |

  10. Change in the sequence of nucleotide in DNA is called as

    Text Solution

    |

  11. A plant of F(1)-generation has genotype 'AABbCC'. On selfing of this p...

    Text Solution

    |

  12. Mendel obtained wrinkled seeds in pea due to deposition of sugars inst...

    Text Solution

    |

  13. Which of these do not follow independent assortment?

    Text Solution

    |

  14. Inheritance would be extranuclear in case of

    Text Solution

    |

  15. Number of Barr bodies in XXXX female would be

    Text Solution

    |

  16. Male XX and female XY sometime occur due to :

    Text Solution

    |

  17. Two nonallelic genes produces the new phenotype when present together ...

    Text Solution

    |

  18. A and B genes are linked. What shall be the genotype of progeny in a c...

    Text Solution

    |

  19. Ratio of complementary genes is

    Text Solution

    |

  20. During organ differentiation in Drosophila, an organ is modified to an...

    Text Solution

    |