Physical association of genes on a chromosome is called
A
Repulsion
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B
Linkage
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C
Aneuploidy
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D
Duplication
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E
Polyploidy
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Solution
The correct option is A Linkage
Repulsion refers to the case where each homologous chromosome has one dominant and one recessive allele from the two genes.
Linked genes sit close together (physical association) on a chromosome, making them likely to be inherited together.
Aneuploidy is the presence of an abnormal number of chromosomes in a cell.
Duplication is a particular kind of mutation (change) involving the production of one or more copies of any piece of DNA, including a gene or even an entire chromosome.
Polyploidy is the heritable condition of possessing more than two complete sets of chromosomes.