HEREDITY
LINKED GENES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they are immediately next to each other
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they are very far apart
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they are found on a sex chromosome
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they contain mutations
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Detailed explanation-1: -When genes are on the same chromosome but very far apart, they assort independently due to crossing over (homologous recombination). This is a process that happens at the very beginning of meiosis, in which homologous chromosomes randomly exchange matching fragments.
Detailed explanation-2: -When genes are close together on a chromosome, the alleles on the same chromosome tend to be inherited as a unit more frequently than not. Such genes do not display independent assortment and are said to be linked.
Detailed explanation-3: -So, the correct answer is ‘They are very far apart on the same chromosome’.
Detailed explanation-4: -if two genes experience independent assortment, which assumption is most likely true? The expression of one gene does not affect the expression of the other.