Pigmentation in moth is maternally affected where a+ is the allele for...
Pigmentation in moth is the example of the maternal effect in which the cytoplasm and genotype of the mother affect the phenotype of the progeny as mother genotype is a+/a that’s why all the progenies will be pigmented at larval stages
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Pigmentation in moth is maternally affected where a+ is the allele for...
Explanation:
Pigmentation in moths is maternally affected, which means that the pigmentation of the offspring is determined by the genotype of the mother. In this case, the mother has a genotype of a/a, meaning that she is unpigmented.
Genotypes:
- Mother: a/a
- Father: aa
Genetic Cross:
When we cross the mother (a/a) with the father (aa), we get the following possibilities for the progeny:
- Offspring 1: a/a (unpigmented)
- Offspring 2: a/a (unpigmented)
- Offspring 3: a/a (unpigmented)
- Offspring 4: a/a (unpigmented)
Explanation:
Since pigmentation in moths is maternally affected, the genotype of the mother (a/a) determines the pigmentation of the offspring. In this case, all the offspring will have the genotype a/a, which means they will all be unpigmented at the larval stage.
Therefore, the correct answer is option B: All pigmented at the larval stage.
Key Points:
- Pigmentation in moths is maternally affected.
- The genotype of the mother determines the pigmentation of the offspring.
- The mother has a genotype of a/a, meaning she is unpigmented.
- The father has a genotype of aa, meaning he is pigmented.
- When the mother (a/a) is crossed with the father (aa), all the offspring will have the genotype a/a and be unpigmented at the larval stage.