Class 10 Exam > Class 10 Questions > How do variations occur during reproduction?a...
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How do variations occur during reproduction?
- a)By environmental influences
- b)By genetic recombination and mutations
- c)By genetic inheritance alone
- d)By changes in physical characteristics
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
How do variations occur during reproduction?a)By environmental influen...
Variations during reproduction primarily occur through:
- Genetic Recombination: During sexual reproduction, chromosomes from both parents exchange genetic material, creating unique combinations in offspring.
- Mutations: Random changes in the DNA sequence can lead to new traits, introducing variations across generations.
These processes ensure diversity within a species, aiding in adaptation and survival. Genetic inheritance alone does not account for new variations, making option B the correct answer.
Community Answer
How do variations occur during reproduction?a)By environmental influen...
Understanding Variations During Reproduction
Variations in offspring arise primarily through two key processes: genetic recombination and mutations. Here's a detailed explanation of how these processes contribute to variation.
Genetic Recombination
- During sexual reproduction, genetic material from two parents combines.
- This occurs through the process of meiosis, where homologous chromosomes exchange segments in a process called crossing over.
- The resulting gametes (sperm and egg) carry unique combinations of genes, leading to diverse traits in the offspring.
Mutations
- Mutations are random changes in the DNA sequence.
- They can occur due to errors during DNA replication or as a result of environmental factors (like radiation or chemicals).
- While many mutations are neutral or harmful, some can provide beneficial traits that may enhance survival and reproduction.
Importance of Variations
- Variations are crucial for the process of natural selection.
- They enable populations to adapt to changing environments, enhancing the likelihood of survival.
- Genetic diversity is essential for the evolution of species over time.
Conclusion
In summary, variations during reproduction primarily occur due to genetic recombination and mutations. While environmental influences can affect the expression of traits, the underlying genetic basis for variation stems from these two processes. This genetic diversity is vital for the adaptability and evolution of organisms.
Variations in offspring arise primarily through two key processes: genetic recombination and mutations. Here's a detailed explanation of how these processes contribute to variation.
Genetic Recombination
- During sexual reproduction, genetic material from two parents combines.
- This occurs through the process of meiosis, where homologous chromosomes exchange segments in a process called crossing over.
- The resulting gametes (sperm and egg) carry unique combinations of genes, leading to diverse traits in the offspring.
Mutations
- Mutations are random changes in the DNA sequence.
- They can occur due to errors during DNA replication or as a result of environmental factors (like radiation or chemicals).
- While many mutations are neutral or harmful, some can provide beneficial traits that may enhance survival and reproduction.
Importance of Variations
- Variations are crucial for the process of natural selection.
- They enable populations to adapt to changing environments, enhancing the likelihood of survival.
- Genetic diversity is essential for the evolution of species over time.
Conclusion
In summary, variations during reproduction primarily occur due to genetic recombination and mutations. While environmental influences can affect the expression of traits, the underlying genetic basis for variation stems from these two processes. This genetic diversity is vital for the adaptability and evolution of organisms.
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How do variations occur during reproduction?a)By environmental influencesb)By genetic recombination and mutationsc)By genetic inheritance aloned)By changes in physical characteristicsCorrect answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about How do variations occur during reproduction?a)By environmental influencesb)By genetic recombination and mutationsc)By genetic inheritance aloned)By changes in physical characteristicsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How do variations occur during reproduction?a)By environmental influencesb)By genetic recombination and mutationsc)By genetic inheritance aloned)By changes in physical characteristicsCorrect answer is option 'B'. Can you explain this answer?.
How do variations occur during reproduction?a)By environmental influencesb)By genetic recombination and mutationsc)By genetic inheritance aloned)By changes in physical characteristicsCorrect answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about How do variations occur during reproduction?a)By environmental influencesb)By genetic recombination and mutationsc)By genetic inheritance aloned)By changes in physical characteristicsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How do variations occur during reproduction?a)By environmental influencesb)By genetic recombination and mutationsc)By genetic inheritance aloned)By changes in physical characteristicsCorrect answer is option 'B'. Can you explain this answer?.
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