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In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would be
- a)All dextral
- b)All sinistral
- c)Ratio of Dextral to Sinistral progeny would be 3 : 1
- d)Ratio of Sinistral to Dextral progeny would be 3 : 1
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
In Limnaea peregra, shell coiling is due to maternal effect. If the fe...
Since both the mother and the father have genotype dd, the progeny would contain dd as well. Since the mother did not have a dominant allele, her gametes would not contain the protein required for dextral coiling of the shell in the cytoplasm although she herself had a dextrally coiling shell. Hence, they would all be sinistral.
Most Upvoted Answer
In Limnaea peregra, shell coiling is due to maternal effect. If the fe...
The correct answer is option 'B' - All sinistral.
Explanation:
1. Maternal effect in shell coiling:
In Limnaea peregra, shell coiling is determined by a maternal effect, which means that the phenotype of the offspring is determined by the genotype of the mother. In this case, the mother's genotype is dextral (dd) and the father's genotype is sinistral (dd).
2. Inheritance of shell coiling:
In Limnaea peregra, shell coiling is determined by a single gene with two alleles - dextral (d) and sinistral (D). The dextral allele (d) is dominant over the sinistral allele (D). This means that if an individual has at least one copy of the dextral allele, it will exhibit dextral shell coiling.
3. Genotypes of the parents:
The female parent is dextral (dd) and the male parent is sinistral (dd). This means that the female parent has two copies of the dextral allele (dd) and the male parent has two copies of the sinistral allele (dd).
4. Inheritance pattern:
When the female parent is dextral (dd) and the male parent is sinistral (dd), all the progeny will inherit one copy of the dextral allele from the female parent (dd) and one copy of the sinistral allele from the male parent (dd). As the dextral allele is dominant over the sinistral allele, all the progeny will exhibit dextral shell coiling.
5. Conclusion:
Therefore, the correct answer is option 'B' - All sinistral.
Explanation:
1. Maternal effect in shell coiling:
In Limnaea peregra, shell coiling is determined by a maternal effect, which means that the phenotype of the offspring is determined by the genotype of the mother. In this case, the mother's genotype is dextral (dd) and the father's genotype is sinistral (dd).
2. Inheritance of shell coiling:
In Limnaea peregra, shell coiling is determined by a single gene with two alleles - dextral (d) and sinistral (D). The dextral allele (d) is dominant over the sinistral allele (D). This means that if an individual has at least one copy of the dextral allele, it will exhibit dextral shell coiling.
3. Genotypes of the parents:
The female parent is dextral (dd) and the male parent is sinistral (dd). This means that the female parent has two copies of the dextral allele (dd) and the male parent has two copies of the sinistral allele (dd).
4. Inheritance pattern:
When the female parent is dextral (dd) and the male parent is sinistral (dd), all the progeny will inherit one copy of the dextral allele from the female parent (dd) and one copy of the sinistral allele from the male parent (dd). As the dextral allele is dominant over the sinistral allele, all the progeny will exhibit dextral shell coiling.
5. Conclusion:
Therefore, the correct answer is option 'B' - All sinistral.
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In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer?
Question Description
In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer?.
In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer?.
Solutions for In Limnaea peregra, shell coiling is due to maternal effect. If the female parent is dextral (dd) and the male parent is sinistral (dd), the progeny would bea)All dextralb)All sinistralc)Ratio of Dextral to Sinistral progeny would be 3 : 1d)Ratio of Sinistral to Dextral progeny would be 3 : 1Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for IIT JAM.
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