What do genetic maps represent?

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(B) Genetic maps,also known as linkage maps,represent the linear arrangement of genes on a chromosome. They are constructed based on the frequency of

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The position of genes on a chromosome.

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(B) Genetic maps,also known as linkage maps,represent the linear arrangement of genes on a chromosome. They are constructed based on the frequency of recombination between gene pairs during meiosis. The distance between genes on a genetic map is measured in map units or centimorgans $(cM)$,which corresponds to the percentage of crossing over between them.

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In which of the following is the phenomenon of crossing over $NOT$ observed?

In a chromosome map of maize,two genes $R$ and $Y$ are located very close to each other. When $RRYY$ and $rryy$ genotypes are crossed,the $F_2$ generation analysis shows:

Crossing over causes

Which one of the following pairs is correctly matched?

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