If two genes are said to be linked, what is meant by the term 'linked'?
Correct answer: B. Two genes both occupy the same chromosome
- A. Two genes are both at the same loci on a chromosome
- B. Two genes both occupy the same chromosome
- C. They are both alleles of the same gene
- D. The phenotypes of the genes are both influenced by the gender of their owner
Explanation
Linked genes are different genes located on the same chromosome, so they tend to be inherited together. Two genes cannot occupy the same locus, alleles are versions of one gene rather than two genes, and genes whose expression depends on sex are sex influenced rather than linked.
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About Gene Linkage and Crossing Over
Linked genes lie on the same chromosome and tend to pass together, unlike genes that assort independently on different chromosomes. The topic connects linkage with homologous pairing, crossing over during prophase I of meiosis, recombinant and parental offspring, and recombination frequency as an estimate of gene distance.
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