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Question

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.
So, the correct answer is 'Linkage'.

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