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When heterozygous tall plants are self -...

When heterozygous tall plants are self - pollinated , then tall and dwarf plants are obtained . This explains

A

Law of dominance

B

Law of segregation

C

division in spores

D

independent assortment

Text Solution

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The correct Answer is:
To solve the question regarding the self-pollination of heterozygous tall plants and the resulting tall and dwarf plants, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Genotype**: - The heterozygous tall plants have the genotype Tt, where 'T' represents the dominant allele for tallness and 't' represents the recessive allele for dwarfism. 2. **Gamete Formation**: - During self-pollination, the Tt plants will produce gametes. The possible gametes formed from Tt are T and t. 3. **Punnett Square Setup**: - To determine the offspring, we can set up a Punnett square. The gametes from one parent (Tt) will be placed on one side and the gametes from the other parent (Tt) on the other side. ``` T t ------------ T | TT | Tt | ------------ t | Tt | tt | ``` 4. **Offspring Genotypes**: - The resulting genotypes from the Punnett square are: - TT (homozygous tall) - Tt (heterozygous tall) - Tt (heterozygous tall) - tt (homozygous dwarf) 5. **Phenotypic Ratio**: - The phenotypic ratio of the offspring is: - 3 tall (TT and Tt) : 1 dwarf (tt) 6. **Conclusion**: - The presence of both tall and dwarf plants among the offspring indicates that the alleles segregate during gamete formation, which is explained by the **Law of Segregation**. ### Final Answer: - The correct explanation for the observation is **B. Law of Segregation**.
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