if a true breeding strain of sweet pea is allowed to self-fertilize which of the following statements is true?
If a true breeding strain of sweet pea is allowed to self-fertilize which of the following statements is true?
Answer:
A true-breeding strain is one in which the organisms consistently produce offspring with the same traits when self-fertilized or crossed with another of the same strain. In genetics, this typically means the organism is homozygous for the traits of interest.
When a true-breeding sweet pea strain self-fertilizes, it will continue to produce offspring that display the same phenotypic traits across generations. This is because true-breeding strains are homozygous, and self-fertilization will not introduce new alleles or phenotypic variations.
Key Points:
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Homozygosity:
- A true-breeding strain is homozygous for the traits it expresses. This means that both alleles for a given gene are the same (e.g., AA or aa).
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Consistent Offspring Traits:
- Offspring will exhibit the same traits as the parent strain because there are no other alleles to introduce variation.
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Genotype Stability:
- The genotype remains consistent from one generation to the next in the absence of mutations, as self-fertilization continues to propagate the same alleles.
Thus, the true statement when a true-breeding strain of sweet pea self-fertilizes is: The offspring will inherit the same traits as the parent due to the homozygous nature of the true-breeding strain.