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Question
The genotype of a plant showing the dominant phenotype can be determined by :
The genotype of a plant showing the dominant phenotype can be determined by :
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Solution
The correct option is A Test cross
To identify whether an organism exhibiting a dominant trait is homozygous or heterozygous for a specific allele, a test cross is performed.
The organism in question is crossed with an organism that is homozygous for the recessive trait, and the offspring of the test cross is examined. Phenotype of F1 generation Genotype of unknown parent All dominant phenotypes Homozygous dominant 50% recessive and 50% dominant phenotypes Heterozygous
To identify whether an organism exhibiting a dominant trait is homozygous or heterozygous for a specific allele, a test cross is performed.
The organism in question is crossed with an organism that is homozygous for the recessive trait, and the offspring of the test cross is examined.
| Phenotype of F1 generation | Genotype of unknown parent |
| All dominant phenotypes | Homozygous dominant |
| 50% recessive and 50% dominant phenotypes | Heterozygous |
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