Home
Class 12
BIOLOGY
Define and design a testcross....

Define and design a testcross.

Text Solution

Verified by Experts

The cross which is carried out to determine the expected genotype of `F_1` hybrids is known as testcross. It is carried out between hybrid and homozygous recessive parent.
(a) Tall (TT) X Dwarf (tt)
If only one type of phenotype is found in `F_1` offspring, the `F_1` hybrid is homozygous.
(b) Tall (Tt) X Dwarf (tt)

If both types of phenotypes are obtained in equal proportion, the hybrid is heterozygous.
Promotional Banner

Topper's Solved these Questions

  • PRINCIPLES OF INHERITANCE AND VARIATION

    ICSE|Exercise PRACTICE QUESTIONS ( VERY SHORT ANSWER TYPE QUESTIONS)|31 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATION

    ICSE|Exercise PRACTICE QUESTIONS ( SHORT ANSWER TYPE-I QUESTIONS)|15 Videos

  • ORGANISMS AND POPULATIONS

    ICSE|Exercise COMPETITION CORNER (ASSERTION AND REASON TYPE QUESTIONS)|22 Videos

  • QUESTION PAPER 2022 TERM 1

    ICSE|Exercise MULTIPLE CHOICE QUESTIONS|45 Videos

Similar Questions

Explore conceptually related problems

Define and design a test − cross?

Give IUPAC names for the following using E and Z designations. a. , b. c. , d.

With reference to the term mechanical advantage, velocity ratio and efficiency of a machine, name and define the term that will not change for a machine of a given design.

Assign the R and S designation to the following compounds:

Explain why steel is preferred to copper, brass, aluminium in heavy-duty machines and in structural designs.

Eggs of birds and reptiles can be designated as

Which set of organs is designated as heterocrine glands?

In the following compound, designated as A, B, C will be numbered as

Computer based study and designing of genome is called

ICSE-PRINCIPLES OF INHERITANCE AND VARIATION-MULTIPLE CHOICE QUESTION
  1. Define and design a testcross.

    Text Solution

    |

  2. The genetic ratio of 9:3:3:1 is due to:

    Text Solution

    |

  3. Choose the chromosome, in a human, that possesses least number of gene...

    Text Solution

    |

  4. G. J. Mendel was a:

    Text Solution

    |

  5. Select the incorrect match.

    Text Solution

    |

  6. In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that:

    Text Solution

    |

  7. A monohybrid cross produced tall and dwarf pea plants in ratio of 3:1....

    Text Solution

    |

  8. Common test to find genotype of hybrid is by:

    Text Solution

    |

  9. Which one is a test cross?

    Text Solution

    |

  10. Mating of an organism to a double recessive in order to determine whet...

    Text Solution

    |

  11. A cross between two tall plants resulted in offspring having few dwarf...

    Text Solution

    |

  12. The term genetics was proposed by:

    Text Solution

    |

  13. The F2 genotypic ratio of monohybrid cross is:

    Text Solution

    |

  14. A dihybrid for qualitative trait is crossed with homozygous recessive ...

    Text Solution

    |

  15. In order to find out the different types of gametes produced by a pea ...

    Text Solution

    |

  16. The autosomal disorder/disease in humans is:

    Text Solution

    |

  17. Distance between the genes and percentage of recombination shows:

    Text Solution

    |

  18. In Mirabilis jalapa, the number of F2 red flowered plants in a cross ...

    Text Solution

    |

  19. In pea plants, yellow seeds are dominant to green. If a heterozygous y...

    Text Solution

    |

  20. Which of the following is best suited for codominance?

    Text Solution

    |

  21. Incomplete dominance is shown by:

    Text Solution

    |