Which of the following statements is true? linked genes are found on different chromosomes. the observed frequency of recombination of two genes that are far apart from each other has a maximum value of 100%. crossing over occurs during prophase ii of meiosis. the closer two genes are on a chromosome, the lower the probability that a crossover will occur between them.

The correct answer is option The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them.

In case, two genes are present in very close proximity to one another, they would represent the phenomenon of linkage. Due to the the presence of the linkage between the two closely related genes, the crossing over between them would not occur. As the distance between the two genes is decreased, the linkage becomes more strong and reduced the chances of the crossing over. Hence, it can be said that the chance of the crossing over between two genes varies according to the distance between them.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

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