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When two genes are situated very close to one another on a chromosome________.
- a)Hardly any cross-overs are produced
- b)The percentage of crossing over between them is very high
- c)No crossing over can take place
- d)Only double cross-over can occur between them
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
When two genes are situated very close to one another on a chromosome_...
- When two genes are situated very close to one another on chromosome, hardly any cross-over are produced.
- Such genes are called linkage and do not separate from each other during gamete formation.
Most Upvoted Answer
When two genes are situated very close to one another on a chromosome_...
Follow simple concept:: linkage is inversly related to crossing over .when linkage is done means genes come close to one another it means crossing over cannot take place... I hope you got!!!
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When two genes are situated very close to one another on a chromosome_...
Crossing Over between Genes Situated Close to Each Other on a Chromosome
When two genes are situated very close to one another on a chromosome, crossing-over between them is limited.
Explanation:
- Crossing-over refers to the exchange of genetic material between homologous chromosomes during meiosis.
- The frequency of crossing-over between two genes is inversely proportional to the distance between them on the same chromosome. Thus, the closer two genes are, the less likely they are to undergo crossing-over.
- This is because crossing-over occurs at points of physical exchange or chiasmata between homologous chromosomes. If two genes are very close together, there are fewer points of physical exchange between them, making crossing-over less likely.
- The percentage of crossing-over between two genes is referred to as the recombination frequency. When two genes are very close together, the recombination frequency is very low.
- Therefore, when two genes are situated very close to one another on a chromosome, hardly any crossing-overs are produced.
Example:
- An example of two genes situated close together on a chromosome is the gene for red-green color blindness and the gene for hemophilia, which are located on the X chromosome. These two genes are only about 6 map units apart, making them very close together. As a result, the recombination frequency between them is very low, at around 1%.
When two genes are situated very close to one another on a chromosome, crossing-over between them is limited.
Explanation:
- Crossing-over refers to the exchange of genetic material between homologous chromosomes during meiosis.
- The frequency of crossing-over between two genes is inversely proportional to the distance between them on the same chromosome. Thus, the closer two genes are, the less likely they are to undergo crossing-over.
- This is because crossing-over occurs at points of physical exchange or chiasmata between homologous chromosomes. If two genes are very close together, there are fewer points of physical exchange between them, making crossing-over less likely.
- The percentage of crossing-over between two genes is referred to as the recombination frequency. When two genes are very close together, the recombination frequency is very low.
- Therefore, when two genes are situated very close to one another on a chromosome, hardly any crossing-overs are produced.
Example:
- An example of two genes situated close together on a chromosome is the gene for red-green color blindness and the gene for hemophilia, which are located on the X chromosome. These two genes are only about 6 map units apart, making them very close together. As a result, the recombination frequency between them is very low, at around 1%.
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When two genes are situated very close to one another on a chromosome________.a)Hardly any cross-overs are producedb)The percentage of crossing over between them is very highc)No crossing over can take placed)Only double cross-over can occur between themCorrect answer is option 'A'. Can you explain this answer?
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When two genes are situated very close to one another on a chromosome________.a)Hardly any cross-overs are producedb)The percentage of crossing over between them is very highc)No crossing over can take placed)Only double cross-over can occur between themCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about When two genes are situated very close to one another on a chromosome________.a)Hardly any cross-overs are producedb)The percentage of crossing over between them is very highc)No crossing over can take placed)Only double cross-over can occur between themCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When two genes are situated very close to one another on a chromosome________.a)Hardly any cross-overs are producedb)The percentage of crossing over between them is very highc)No crossing over can take placed)Only double cross-over can occur between themCorrect answer is option 'A'. Can you explain this answer?.
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