A cross between a tall plant (TT) and short pea plant (tt) resulted in...
Explanation of the correct option: C.
- According to the Mendel's first law of inheritance or law of dominance, the hybrid offspring produced will only inherit the dominant trait in the phenotype.
- The alleles that are suppressed are known as recessive traits while that determines the trait are known as dominant traits.
- A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because tallness is the dominant trait.
- Thus, tallness is the dominant trait.
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A cross between a tall plant (TT) and short pea plant (tt) resulted in...
Explanation:
Genetic Basis:
- In this case, the tall plant (TT) is the dominant trait, while the short pea plant (tt) is the recessive trait.
- When a tall plant (TT) is crossed with a short pea plant (tt), all the offspring will inherit one dominant allele for tallness from the tall plant parent.
Dominant and Recessive Traits:
- Tallness (T) is the dominant trait in this case, which means that even if an individual has one allele for tallness (Tt), the dominant trait will be expressed.
- Shortness (t) is the recessive trait, meaning that an individual must have two copies of the recessive allele (tt) to exhibit the short phenotype.
Punnett Square:
- When a tall plant (TT) is crossed with a short pea plant (tt), the Punnett square will show that all the offspring will inherit one allele for tallness (Tt).
- Since tallness (T) is dominant, all the offspring will exhibit the tall phenotype.
Conclusion:
- Therefore, in this cross between a tall plant (TT) and a short pea plant (tt), all the progeny will be tall plants because tallness is the dominant trait in this genetic scenario.
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