Home
Class 12
BIOLOGY
the linkage map of X -chroosomes of frui...

the linkage map of X -chroosomes of fruitfly has 66 units with yellow body gene (y) at one end and bobbed hair (b) gene at the other end the recomnation frequency between these two genes (y and b) should be :

A

`le 50%`

B

`100%`

C

`66%`

D

`gt 50%`

Text Solution

Verified by Experts

The correct Answer is:
B
The actual distance between two genes is said to be equivalent to the percentage of crossing over between these two genes. Since, the two genes lie at the ends of the chromosome, there are 100% chances of their segregation during crossing over.
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

The linkage map of X - chrommosomes of fruitfly has 66 units , with yellow body gene (y) at one end and bobbed hair (b) gene at the other end . The recombination frequency between these two genes (y and b) should be

The linkage map of X-chromosome of fruit fly has 66 units with yellow body gene Y at one end and bobbed hair B gene at he other end. The recombination frequency between these two genes Y and B should be

If (a,b) be an end of a diagonal of a square and the other diagonal has the equation x-y=a, then another vertex of the square can be

A 2.00 m-long rope, having a mass of 80 g, is fixed at one end and is tied to a light string at the other end. The tension in the string is 256 N. (a) Find the frequencies of the fundamental and the first two overtones. (b) Find the wavelength in the fundamental and the first two overtones.

Assertion : Starch synthesis in pea seeds is controlled by one gene. Reason: This gene has two alleles (B and b)

Pipe A is 0.50 m long and open at both ends. Pipe B is open at one end and closed at the other end. Determine the length of pipe B so that it has the same fundamental frequency as A.

A scientist performed the gene mapping experiments in maize. He mapped the gene on chromosomes on the basis of % crossing over between different genes. One map unit corresponds to one % crossing over or recombination. Te genes showing more than 50% recombination were not supposed to be linked on same chromosome. In crossing over studies on maize, scientist observed the following % crossing over between A B, C, d- between. A and D 10% between A and C 3% between genes C and D 7% between genes A and B 5% , and between genes C and B 8% on the basis of above observation find out the correct sequence of tenes Alt B, C, and D on chromosomes :-

A rod of length 2 units whose one ends is (1, 0, -1) and other end touches the plane x-2y+ 2z+4=0 , then which statement is false

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-PRINCIPLES OF INHERITANCE AND VARIATION -MCQ
  1. Pattern baldness, moustanches and beard in human males are examples of...

    Text Solution

    |

  2. Two crosses between the same pair of genotypes or phenotypes in which ...

    Text Solution

    |

  3. the linkage map of X -chroosomes of fruitfly has 66 units with yellow ...

    Text Solution

    |

  4. Down's syndrome is caused by an extra copy of chromosome number 21. Wh...

    Text Solution

    |

  5. The genes controlling the seven pea characters studied by Mendel are n...

    Text Solution

    |

  6. Which one of the following traits of garden pea studied by Mendel was ...

    Text Solution

    |

  7. Which of the following discoveries resulted in a Nobel Prize

    Text Solution

    |

  8. When a cluster of genes shows linkage behaviour they

    Text Solution

    |

  9. In Drosophila, the sex is determined by

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  12. Genetic map is one that :

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  19. Which of these do not follow independent assortment?

    Text Solution

    |

  20. Inheritance would be extranuclear in case of

    Text Solution

    |