Home
Class 12
BIOLOGY
Assertion : Chromosome 1 has 231 genes a...

Assertion : Chromosome 1 has 231 genes and the Y has 2968 genes.
Reason : Repetitive sequences of DNA are thought to have direct coding function and shed light on chromosome structure, dynamics and evolution.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
`**` Chromosome 1 has most genes (2968), and the Y has the fewest (231).
`**` Reptitive sequences are streches of DNA sequences that are repeated many times, sometimes hundered to thousand times. They are thought to have no direct coding functions, but they shed light on chromosome structure, dynamics and evolution.
Promotional Banner

Topper's Solved these Questions

  • MOLECULAR BASIS OF INHERITANCE

    A2Z|Exercise Section C PREVIOUS YEARS' EXAMINATION QUESTIONS (NEET/AIPMT Question)|74 Videos

  • MOLECULAR BASIS OF INHERITANCE

    A2Z|Exercise Section C PREVIOUS YEARS' EXAMINATION QUESTIONS (AIIMS Question)|24 Videos

  • MOLECULAR BASIS OF INHERITANCE

    A2Z|Exercise Section A: Topicwise Questions (topic 9: Dna Fingerprinting)|16 Videos

  • MOCK TEST 3

    A2Z|Exercise EXERCISE|90 Videos

  • ORGANISMS AND POPULATIONS

    A2Z|Exercise Section D: Chapter-end Test|50 Videos

Similar Questions

Explore conceptually related problems

Assertion : Repetitive sequences make up very large portion of human genome. Reason : Repetitive sequences do not have direct coding functions in the genome.

Assertion :- Repeated sequence make up very large portion of the human genome. Reason: They have no direct coding functions but useful in study of chromsome structure. Dynamics & evolution.

Chromosomes I has ……..A…...genes and Y-chromosome has .....B…... genes.

Assertion Inheritance of halandric genes is always from father to son Reason Holandric genes are found on Y-chromosome

Assertion :- Every chromosome essentially has a primary constriction or the centromere. Reason:- On sides of centromere disc shaped structure called kinetochore are present.

Assertion :- The sequencing of chromosome-1 was completed at last in May-2006 Reason : Chromosome-1 in the longest chromsome with macimum number of genes.

Assertion (A) : Haemophilia is a recessive sex linked disease. Reason (R ) : Haemophilia occurs due to mutation of a structural gene on chromosome 15.

Assertion:There are more colour blind men than woman throughout the world Reason : Colour blindness is a sex-linked disease resulting from a recessive gene on the Y chromosomes.

A2Z-MOLECULAR BASIS OF INHERITANCE-Section B: Assertion-reasoning Questions
  1. Assertion : For the transmission of genetic information, RNA is better...

    Text Solution

    |

  2. Assertion : RNA being a catalyst was reactive and hence unstable. Re...

    Text Solution

    |

  3. Assertion : E. coli divides in 20 minutes. Reason : In E. coli the p...

    Text Solution

    |

  4. Assertion : Deoxyribonucleoside triphosphate act as substrates and als...

    Text Solution

    |

  5. Assertion : Origin of replication (ori) is a definite region in E. col...

    Text Solution

    |

  6. Assertion : If a piece of DNA to be propagated during recombinant DNA ...

    Text Solution

    |

  7. Assertion : In transcription only a segment of DNA and only one of the...

    Text Solution

    |

  8. Assertion : Monocistronic genes are found in prokaryotes Reason : Po...

    Text Solution

    |

  9. Assertion : Split genes are found in eukaryotes. Reason : Introns or...

    Text Solution

    |

  10. Assertion : All three ENAs (mRNA, tRNA and rRNA) are needed to synthes...

    Text Solution

    |

  11. Assertion : Nucleotide triphosphates acts as substrates during transcr...

    Text Solution

    |

  12. Assertion : There is single DNA-dependent RNA polymerase that catalyse...

    Text Solution

    |

  13. Assertion : The transcription and traslation can be coupled in bacteri...

    Text Solution

    |

  14. Assertion : The relationship between genes and DNA are best understood...

    Text Solution

    |

  15. Assertion : The HGP was coordinated by the U.S. Department of Energy a...

    Text Solution

    |

  16. Assertion : Almost all (99.9%) nuceotide bases are exactly the same in...

    Text Solution

    |

  17. Assertion : The size of VNTR varies from 0.1 to 20kb. Reason : The n...

    Text Solution

    |

  18. Assertion : Chromosome 1 has 231 genes and the Y has 2968 genes. Rea...

    Text Solution

    |

  19. Statement A : The primary transcript produced in eukaryotic is transla...

    Text Solution

    |

  20. Assertion : Synthesis of mRNA takes place in 5' rarr 3' direction Re...

    Text Solution

    |