Gene linkage is:
Correct answer: A. Physical association of genes on a chromosome
- A. Physical association of genes on a chromosome
- B. Physiological association of genes
- C. Both physical and physiological associations
- D. Neither physical nor physiological associations
Explanation
The correct answer is Option A: Physical association of genes on a chromosome. Gene linkage occurs because genes that are close together on the same chromosome tend to be inherited together, as they are physically linked. This linkage affects how traits are passed from parents to offspring. Option B, 'Physiological association of genes,' is incorrect because gene linkage is not about physiological effects but rather physical proximity on a chromosome. Option C incorrectly suggests both associations are involved, which is not the case. Option D is incorrect as it denies the concept of gene linkage entirely.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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