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Question
Design a test-cross.
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Solution 1
If the progenies produced by a test cross show 50% dominant trait and 50% recessive trait, then the unknown individual is heterozygous for a trait. On the other hand, if the progeny produced shows a dominant trait, then the unknown individual is homozygous for a trait.
Solution 2
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RELATED QUESTIONS
What is a test cross?
Explain the significance of a test cross.
Explain the statement of
Test cross is back cross but back cross is not necessarily a test cross.
Define the following term:
Dihybrid cross
Read the following case and select the correct option.
ln a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring.
Therefore, it can be concluded that;
In order to achieve a dihybrid test cross, the F1 hybrid YyRr should be crossed will which one of the following genotypes?
A cross between Fl hybrid and its parent is called______.
Match List I with List II -
| List-I | List-II |
| A. Two or more alternative forms of a gene | I. Back cross |
| B. Cross of F1 progeny with homozygous recessive parent | II. Ploidy |
| C. Cross of F1 progeny with any of the parents | III. Allele |
| D. Number of chromosome sets in plant | IV. Test cross |
Choose the correct answer from the options given below:
What is the primary purpose of performing a test cross in genetics?
In a test cross, which parent must always be used alongside the dominant phenotype individual?
When a test cross produces all offspring with the dominant phenotype, what can be concluded about the dominant parent's genotype?
What phenotypic ratio in test cross offspring indicates that the dominant parent is heterozygous (Tt)?
What is the expected genotypic ratio when an F₁ heterozygous individual (Tt) is back crossed with the homozygous dominant parent (TT)?
What is the primary practical application of test crosses in agriculture?
Based on test cross principles, if a tall plant consistently produces dwarf offspring when crossed with homozygous dwarf plants, what is the tall plant's genotype?
How would you use a test cross to confirm that a plant with dominant morphology is truly homozygous dominant (TT)?
