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प्रश्न
Explain the statement of
Test cross is back cross but back cross is not necessarily a test cross.
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उत्तर
- In the back cross, F1 generation can be crossed with either dominant or recessive parent.
- But in test cross, F1 generation is crossed with a recessive parent only.
- Thus, in the back cross, if F1 generation is crossed with a recessive parent it will be a test cross, but if F1 generation is crossed with a dominant parent it will not be a test cross. Therefore, the test cross is a back cross but the back cross is not necessarily a test cross.
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संबंधित प्रश्न
Design a test-cross.
Explain the significance of a test cross.
Define the following term:
Dihybrid cross
An individual produced during a cross between two pure plants differing in two pairs of contrasting characters is always ______
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.
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 is the expected genotypic ratio when an F₁ heterozygous individual (Tt) is back crossed with the homozygous dominant parent (TT)?
In a back cross between F₁ (Tt) and the homozygous recessive parent (tt), what phenotypic ratio is observed?
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?
