Neat well depicted Mendel's mono and dihybrid crosses on separate A4 sheets Indicating their phenotypic and genotypic ratios till F2 generations
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Mendel observed that the F2 progeny of his dihybrid cross had a 9:3:3:1 ratio and produced nine plants with round, yellow seeds, three plants with round, green seeds, three plants with wrinkled, yellow seeds and one plant with wrinkled, green seeds.
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Class 12
>>Biology
>>Principles of Inheritance and Variation
>>Mendel's Experiments and Laws of Inheritance
>>Explain monohybrid cross with suitable e
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Explain monohybrid cross with suitable example.
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A cross between two types of plants of same species considering only the transmission of one character is called monohybrid cross. For example, a cross between tall pea plants and dwarf pea plant that is considering only the height of the parents is a monohybrid cross. It will result in the formation of tall offsprings but they will be hybrid.
Representation of the monohybrid cross: character in focus is the height
Parents- TT X tt
(Tall) (dwarf)
F
1
- Tt
(Heterozygous tall)
On selfing:
Tt X Tt
F
2
- TT Tt Tt tt
Phenotypic ratio- 3 tall: 1 dwarf
Genotypic ratio- 1 homozygous tall: 2 heterozygous tall: 1 homozygous recessive.
Explanation:
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