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Ration obtained in a dihybrid cross....

Ration obtained in a dihybrid cross.

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`9:3:3:1`
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Define dihybrid cross.

What is a dihybrid cross ?

In the F_(2) generation a Mendelian dihybrid cross, the number of phenotypes and genotypes are

Assertion:Law of independent assorment is based on dihybrid cross. Reason:Thefactors of one pair assort independently of the other pair.

Choose the correct statement(s). (I) Incomplete linkage 1:1:1:1 ratio is not obtained in test cross. (II) Synaptonemal complex prevents crossing over in Drosopilla (III) The horizontal cut will not create recombinants according to Robin Holliday. (IV) crossing over is the reason for incomplete linkage

Identify the incorrect statements from the below (I) Incomplete linkage 1:1:1:1 ratio is not obtained in test cross. (II) Synaptonemal complex prevents crossing over in Drosophila. (III) Crossing over is the reason for incomplete linkage. (IV) The horizontal cut will not create recombinants according to Robin Holliday.

Write about dihybrid test cross.

SURA PUBLICATION-HEREDITY-ADDITIONAL QUESTIONS & ANSWERS (ANSWER IN ONE WORD)
  1. Genotypic ration of monohybrid cross

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  2. Graphical representation to calculate probability of genotypes in a ge...

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  3. Ration obtained in a dihybrid cross.

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  4. Who received the Nobel prize for his work on role of chromosomes in he...

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  5. Who gave the term 'Chromosome '?

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  6. What does DNA strand for?

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  7. Point of location of a gene on a chromosome.

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  8. Point of attachment of chromatids of a chromosome

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  9. Bead like structures along the length of a chromomema.

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  10. Another name for secondary constriction of a chromosome.

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  11. Knob like appendages present at one end of the chromsome.

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  12. Combination of a sugar ,phosphate and nitrogenous base.

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  13. Name the process by which DNA makes copies of itself.

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  14. enzyme separate the two strands of the DNA during replication.

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  15. Enzyme which helps in lengthening the new DNA strand during replicatio...

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  16. are the enzymes which help in ligating the broken DNA fragments.

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  17. Short segments of DNA formed in the newstrand during replication of DN...

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  18. Condition involving changes in number of chromosomes present in a cell...

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  19. Another name for Down's syndrome.

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  20. Chromosomal composition of a human sperm.

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