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प्रश्न
Differentiate Between Monohybrid and Dihybrid cross.
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उत्तर
| Monohybrid | Dihybrid |
| Crosses involving a single pair of alleles. It yields a phenotypic ratio of 3 : 1 in F2 generation. | Crosses involving two pairs of alleles. It yields a phenotypic ratio of 9 : 3 : 3 : 1 in F2 generation. |
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संबंधित प्रश्न
Differentiate between the following:
Dominance and Recessive
Given below are the F2 – phenotypic ratios of two independently carried monohybrid crosses :
(i) 1 : 2 : 1
(ii) 3 : 1
Mention what does each ratio suggest.
What is a monohybrid cross? How did Mendel perform this cross?
What do you understand by the terms phenotype and genotype?
A pure tall plant (TT) is crossed with the pure dwarf plant (tt), what would be the F1 and F2 generations? Explain.
Differentiate between inherited and acquired characters. Give one example for each type.
In a monohybrid cross of plants with red and white flowered plants, Mendel got only red-flowered plants. On self-pollinating these F1 plants got both red and white flowered plants in 3:1 ratio. Explain the basis of using RR and rr symbols to represent the genotype of plants of parental generation.
In a cross between red coloured and white coloured flowers, when plants with red coloured flowers of F1 generation were self pollinated, plants of F2 generation were obtained in which 75% of plants were with red flowers and 2.5% plants were with white flowers.
Explain the inheritance of traits in the above cross with the help of a flow chart only along with the ratio of plants obtained.
Given below is a schematic representation of the inheritance of the shape of the seeds of garden peas. Answer the questions that follow:
- Which is the dominant and recessive allele of the trait?
- What does the ratio 3 : 1 in the F2 generation represent?
- State Mendel's Law of Dominance.
