Home
Class 12
BIOLOGY
[A]: Heterosis is superiority of F1 hyb...

[A]: Heterosis is superiority of `F_1` hybrid over its two genetically dissimilar parents.
[R]: Heterosis can be measured in terms of size, yield and growth rate

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:
B
Promotional Banner

Topper's Solved these Questions

  • Fungi

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|27 Videos

  • GENETICS AND EVOLUTION

    TRUEMAN BIOLOGY|Exercise SECTION-A|34 Videos

Similar Questions

Explore conceptually related problems

Read the following statements regarding Mendelian inheritance and choose the correct option 1. Mendel's experiments had samll sample size which gave greater credibility to the data 2. A true breeding line shows a stable trait inheritance and expression for several generations 3. In a dissimilar pair of factors, one member of the pair dominates over the other 4. A recessive parental trait is expressed only in its heterozygous condition 5. Two alleles of a gene are located on homologous sites on homologus chromosomes

When two unrelated individuals or lines are crossed, performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, the perfomance of "F"_(1) hybrid is often superior to both its parents. This phenomenon is called:

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized the F_(2) segregation will show 1. segregation in the expected 9:3:3:1 ratio 2. segregation in 3:1 ratio 3. higher number of parental types 4. higher number of the recombinant types

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: It is not possible to take photograph and count chromosomes when ...

    Text Solution

    |

  2. [A]: Neurospora is an ideal genetic material for research. [R]: Bec...

    Text Solution

    |

  3. [A]: Heterosis is superiority of F1 hybrid over its two genetically d...

    Text Solution

    |

  4. [A]: Mendelian recombinations are due to crossing over. [R]: Crossi...

    Text Solution

    |

  5. [A]: Genes confined to differential region of homologous chromosomes a...

    Text Solution

    |

  6. [A]: Chromosomes appear longer during telophase. [R]: The term chro...

    Text Solution

    |

  7. [A]: Copy choice theory for crossing over was proposed by Belling. ...

    Text Solution

    |

  8. [A]: Kornberg and Ochoa got Nobel Prize in the field of genetics. [...

    Text Solution

    |

  9. Consider the following statements : Assertion (A) : Amber codon is a...

    Text Solution

    |

  10. [A): DNA replicates after mitosis. [R]: In mitosis, the chromosomal...

    Text Solution

    |

  11. [A]: DNA code is copied in the synthesis of tRNA. [R]: tRNA moves o...

    Text Solution

    |

  12. [A]: DNA is associated with proteins. [R]: DNA wound around histone ...

    Text Solution

    |

  13. [A]: Translocation involves transfer of genetic material between homol...

    Text Solution

    |

  14. Assertion : Left-handed DNA is known as B-DNA. Reason : Right - han...

    Text Solution

    |

  15. [A]: Meselson and Stahl tested the Watson and Crick Theory of DNA repl...

    Text Solution

    |

  16. Assertion (A) : Adenine cannot pair with cytosine. Reason ® : Becaus...

    Text Solution

    |

  17. Assertion : DNA is associated with proteins. Reason : DNA binds aro...

    Text Solution

    |

  18. Assertion. The genetic code is degenerate. Reason. Most amino acids ...

    Text Solution

    |

  19. Assertion: A non-overlapping code means that a base in mRNA is not us...

    Text Solution

    |

  20. [A]: Recombinant DNA contains DNA from two or more sources. [R]: Pl...

    Text Solution

    |