Home
Class 12
BIOLOGY
Assertion : Identical twins are produc...

Assertion : Identical twins are produced during two births , resulting from the division of a single fertilized egg .
Reaosn : They are of the different sex and otherwise genetically identical.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • Fungi

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|26 Videos

  • GENETICS AND EVOLUTION

    TRUEMAN BIOLOGY|Exercise SECTION-A|34 Videos

Similar Questions

Explore conceptually related problems

Plants genetically identical to the original plant, produced during tissue culture are called

Assertion: In mitosis, two identical cells are produced from a single cell and karyokinesis is followed by cytokinesis. Reason- Cytokineis is of two types.

Assertion: Two identical waves due to two coherent sources interfere at a point with a phase difference of (2pi)/3 , then the resultant intensity at this point is equal to the individual intensity of the sources. Reason: A phase difference of (2pi)/3 is equivalent to a path difference of lambda/3 .

Read the following statements about reproduction and select the correct ones. (i) It involves a single parent. (ii) It is slower than sexual reproduction. (iii) It produces progenty that are genetically identical with the parent but not with one another. (iv) The progeny of asexual reproduction can be termed as clones.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R). A: Three vectors having magnitudes 10,10 and 25 cannot produce zero resultant. R: If three vectors are producing zero resultant then sum of magnitude of any two is more then or equal to magnitude of third and difference is less than or equal to the magnitude of third.

Assertion: During asexual reproduction, the offspring that are produced are not only identical to one another but also exact copies of their parent. Reason: Morphologically and genetically similar individuals are called clones.

Assertion : There are two identical spherical bodies fixed in two positions as shows. While moving from A to B gravitational potential first increases then decreases. Reason : At centre point of A and B field strength will be zero.

identical wires A amd B of different materials are hung from then ceilling of a room . The density of wire A is greater than the density of wire B but their lengths are same. Identical wave pulses are produced at the bottom of respective wires. The times taken by the pulse to reach the top is

Direction : Carefully read the following information to answer Q.no.1 and Q.no.2 An egg farmer is experimetnting with different feed rations with the aim of increasing his production whilst reducing the cost of the feed per egg produced. The data from two feeding experiments is given below. What are the independent variable in each of the two experiments?

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Chromosomes are divided into hetero- chromatin and euchromatin pa...

    Text Solution

    |

  2. [A]: Triplet code is a degenerate one. [R]: Explanation for degener...

    Text Solution

    |

  3. Assertion : Identical twins are produced during two births , resulti...

    Text Solution

    |

  4. [A]: Genetic engineering is the use of tech- nology to alter the genom...

    Text Solution

    |

  5. [A]: Polymerase chain reaction (PCR) fol- lowed by DNA probe is used d...

    Text Solution

    |

  6. [A]: The preparation of recombinant DNA re- quires restriction enzymes...

    Text Solution

    |

  7. [A]: Plasmids are small accessory rings of DNA found in some bacteria ...

    Text Solution

    |

  8. [A]: Proteins are polymers of amino acids. [R]: Nucleic acids are p...

    Text Solution

    |

  9. [A): Prokaryotic cells do not contain repres- sor protein [R]: The...

    Text Solution

    |

  10. [A]: If a population is of dominant genotype AA, then the frequency of...

    Text Solution

    |

  11. [A]: In paracentric inversions the centromere is outside the inverted ...

    Text Solution

    |

  12. [A]: Polyploidy increases the tolerance of plants towards extreme clim...

    Text Solution

    |

  13. [A]: Haemophillia is a genetically linked dis- ease. [R]: The carri...

    Text Solution

    |

  14. [A]: Cytoplasmic male sterility is observed in maize. [R]: The cyto...

    Text Solution

    |

  15. Assertion: DNA synthesis occurs in G(1) and G(2) periods of cell cycle...

    Text Solution

    |

  16. [A]: Sickle-cell anaemia is a genetically de- termined disorder affect...

    Text Solution

    |

  17. [A]: The deleted region of long arm of chro- mosome 7 contains the ela...

    Text Solution

    |

  18. [A]: Cenromere is the primary constriction on the metaphase chromosome...

    Text Solution

    |

  19. [A]: Dolly, a sheep is an example of cloning. [R]: Cloning in anoth...

    Text Solution

    |

  20. Assertion (A) : Replication and transcription occur in the nucleus but...

    Text Solution

    |