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Assertion: Linkage groups refer to a set of genes that are located on the same chromosome.

Reason: During meiosis, homologous chromosomes can exchange genetic material through the process of crossing over.

Option: 1

Assertion and reason are both true, and reason is an accurate account of assertion. 

Option: 2

Both assertion and reason are accurate, but reason does not adequately explain assertion.

Option: 3

The assertion is correct, but the reasoning is incorrect. 


Option: 4

Both the assertion and reason are incorrect.

Answers (1)


On the same chromosome, there exist collections of genes called linkage groups. This indicates that the locations of these genes on the chromosome are contiguous. The explanation given is also true. Homologous chromosomes join together and can engage in a process known as crossing over or genetic recombination during meiosis, more specifically during prophase I. Genetic material is transferred between non-sister chromatids of homologous chromosomes during crossing over. Alleles may be rearranged and new gene combinations may be created as a result of this genetic material exchange between homologous chromosomes. Due to their lower likelihood of crossing over and genetic recombination, genes that are adjacent to one another on the same chromosome are more likely to be inherited together.

Option 1 is the correct answer.

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