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Assertion (A): In genetics, a heterozygous individual for a certain trait will always exhibit the dominant phenotype.
Reason (R): The dominant allele in a heterozygous genotype masks the expression of the recessive allele.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  • c)
    If Assertion is true but Reason is false
  • d)
    If both Assertion and Reason are false
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Assertion (A): In genetics, a heterozygous individual for a certain tr...
  • Explanation: The assertion is true because in a heterozygous individual, the dominant allele will determine the phenotype.
  • However, the reason is false because the dominant allele does not "mask" the recessive allele but rather is expressed over it.
  • Therefore, the reason is not the correct explanation of the assertion.
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Community Answer
Assertion (A): In genetics, a heterozygous individual for a certain tr...
Understanding the Assertion and Reason
The assertion (A) states that a heterozygous individual will always exhibit the dominant phenotype. The reason (R) explains that the dominant allele masks the expression of the recessive allele. To analyze this, let’s break down the concepts:
Heterozygous Individuals
- Heterozygous individuals possess two different alleles for a specific trait (e.g., Aa, where A is dominant and a is recessive).
- In many cases, the dominant allele will indeed mask the effect of the recessive allele, leading to the expression of the dominant phenotype.
Correctness of Assertion and Reason
- The assertion (A) can sometimes be misleading. While heterozygous individuals typically exhibit the dominant phenotype, there are exceptions in cases of incomplete dominance or co-dominance.
- The reason (R) is fundamentally correct in the context of classic Mendelian genetics, emphasizing the masking effect of the dominant allele.
Conclusion
- Therefore, while the reason explains why the assertion is often true, it does not account for all genetic scenarios, particularly those involving incomplete dominance or co-dominance.
- This makes the assertion (A) too absolute and not universally applicable.
Final Answer
- The correct option is (C): Assertion is true but Reason is false. This reflects that while Heterozygous individuals usually show the dominant phenotype due to dominance, the statement does not hold true in all genetic contexts.
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Assertion (A): In genetics, a heterozygous individual for a certain trait will always exhibit the dominant phenotype.Reason (R): The dominant allele in a heterozygous genotype masks the expression of the recessive allele.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer?
Question Description
Assertion (A): In genetics, a heterozygous individual for a certain trait will always exhibit the dominant phenotype.Reason (R): The dominant allele in a heterozygous genotype masks the expression of the recessive allele.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? for Grade 8 2024 is part of Grade 8 preparation. The Question and answers have been prepared according to the Grade 8 exam syllabus. Information about Assertion (A): In genetics, a heterozygous individual for a certain trait will always exhibit the dominant phenotype.Reason (R): The dominant allele in a heterozygous genotype masks the expression of the recessive allele.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Grade 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): In genetics, a heterozygous individual for a certain trait will always exhibit the dominant phenotype.Reason (R): The dominant allele in a heterozygous genotype masks the expression of the recessive allele.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer?.
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