2. Genes a and b are 21 m.u. apart when mapped inhighly inbred strain 1 of corn and 21 m.u. apart whenmapped in highly inbred strain 2. But when the distance is mapped by testcrossing the F1 progeny of across between strains 1 and 2, the two genes are only1.5 m.u. apart. What arrangement of genes a and band any potential rearrangement breakpoints couldexplain these results?

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A:

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.