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प्रश्न
Design a test-cross.
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उत्तर १
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.
उत्तर २
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संबंधित प्रश्न
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
Long answer type question.
Define test cross and explain its significance.
An individual produced during a cross between two pure plants differing in two pairs of contrasting characters is always ______
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:
In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?
A purple flowered pea plant is crossed with a white flowered pea plant. Among the progeny, there are equal number of purple and white flowered plants. The result indicates that it is ______.
Statement I - Back cross is the crossing of F1 - hybrid with one of the two parents from which they were derived.
Statement II - Test cross involves the crossing of F1 - hybrid with its homozygous recessive parent.
In light of above statements, choose the correct answer from the option 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)?
In a back cross between F₁ (Tt) and the homozygous recessive parent (tt), what phenotypic ratio is observed?
How would you use a test cross to confirm that a plant with dominant morphology is truly homozygous dominant (TT)?
