MCQ on Linkage and Crossing Over

Crossing over is a genetic process during meiosis where homologous chromosomes exchange segments of DNA. This exchange results in genetic variation among offspring by creating new combinations of genes, enhancing diversity, and contributing to evolution’s mechanism. This is an MCQ on Linkage and Crossing Over – Mechanism and its Significance in Sexual Reproduction and Creation of Genetic Variability. You may also like: MCQ on Gene Mapping

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1. 
What is the primary purpose of crossing over in genetics?

2. 
During which phase of meiosis does crossing over occur?

3. 
What is the term for the specific regions on homologous chromosomes where crossing over occurs?

4. 
What is exchanged between homologous chromosomes during crossing over?

5. 
What is the primary consequence of crossing over during meiosis?

6. 
Which of the following best describes the relationship between the frequency of crossing over and the distance between two genes on a chromosome?

7. 
In a genetic map, what unit of measurement is used to quantify the distance between genes based on crossing over frequencies?

8. 
What is the name for the phenomenon where linked genes are less likely to separate during crossing over due to their close proximity on a chromosome?

9. 
What can disrupt the process of crossing over and lead to errors or genetic disorders?

10. 
Which of the following is NOT a source of genetic diversity in sexually reproducing organisms?

11. 
In humans, what type of chromosome pair does not undergo crossing over during meiosis?

12. 
Which enzyme is involved in the physical exchange of genetic material during crossing over?

13. 
What happens to the genetic material involved in crossing over once it has been exchanged between homologous chromosomes?

14. 
What is the significance of crossing over in terms of evolutionary biology?

15. 
Which term describes the genetic phenomenon where alleles on different chromosomes assort independently during meiosis, increasing genetic diversity?

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MCQ on Linkage and Crossing Over




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