Advertisements
Advertisements
प्रश्न
Explain the statement of
Test cross is back cross but back cross is not necessarily a test cross.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
What is a test cross?
Design a test-cross.
Explain the significance of a test cross.
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?
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?
In a back cross between F₁ (Tt) and the homozygous recessive parent (tt), what phenotypic ratio is observed?
What is the primary practical application of test crosses in agriculture?
How would you use a test cross to confirm that a plant with dominant morphology is truly homozygous dominant (TT)?
