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Question
Explain the statement of
Test cross is back cross but back cross is not necessarily a test cross.
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Solution
- 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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RELATED QUESTIONS
What is a test cross?
Design a test-cross.
Explain the significance of a test 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?
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?
