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The genotype of a plant showing the dominant phenotype can be determined by :
[2010]
- a)test cross
- b)dihybrid cross
- c)pedigree analysis
- d)back cross
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The genotype of a plant showing the dominant phenotype can be determin...
Test cross is the cross of an individual with an individual having recessive phenotype. It is used to determine the genotype of a plant showing the dominant phenotype, that means to determine whether the individual exhibiting dominating characters are homozygous or heterozygous.
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The genotype of a plant showing the dominant phenotype can be determin...
Determining the genotype of a plant showing the dominant phenotype:
The dominant phenotype of a plant can be determined by performing a test cross. Test cross is a cross between an individual showing the dominant phenotype and an individual that is homozygous recessive for the trait of interest.
Steps involved in a test cross:
1. Identify the plant showing the dominant phenotype.
2. Select an individual that is homozygous recessive for the trait of interest.
3. Cross the two individuals.
4. Observe the phenotype of the offspring.
5. Determine the genotype of the parent showing the dominant phenotype based on the phenotype of the offspring.
Advantages of a test cross:
1. It helps in determining the genotype of the parent showing the dominant phenotype.
2. It can be used to test the validity of a hypothesis about the mode of inheritance of a trait.
3. It can be used to determine the probability of an offspring inheriting a particular genotype.
Conclusion:
Hence, the correct answer is option 'A' (test cross) as it is the most appropriate method for determining the genotype of a plant showing the dominant phenotype.
The dominant phenotype of a plant can be determined by performing a test cross. Test cross is a cross between an individual showing the dominant phenotype and an individual that is homozygous recessive for the trait of interest.
Steps involved in a test cross:
1. Identify the plant showing the dominant phenotype.
2. Select an individual that is homozygous recessive for the trait of interest.
3. Cross the two individuals.
4. Observe the phenotype of the offspring.
5. Determine the genotype of the parent showing the dominant phenotype based on the phenotype of the offspring.
Advantages of a test cross:
1. It helps in determining the genotype of the parent showing the dominant phenotype.
2. It can be used to test the validity of a hypothesis about the mode of inheritance of a trait.
3. It can be used to determine the probability of an offspring inheriting a particular genotype.
Conclusion:
Hence, the correct answer is option 'A' (test cross) as it is the most appropriate method for determining the genotype of a plant showing the dominant phenotype.
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Community Answer
The genotype of a plant showing the dominant phenotype can be determin...
Test cross a cross between an undetermined genotype and a homozygous recessive genotype.
Since the dominant traits appear in the next generation, a cross like this would help determine the genotype easily.
Since the dominant traits appear in the next generation, a cross like this would help determine the genotype easily.
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The genotype of a plant showing the dominant phenotype can be determined by :[2010]a)test crossb)dihybrid crossc)pedigree analysisd)back crossCorrect answer is option 'A'. Can you explain this answer?
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