Independent assortment of genes does not takes place when:
Correct answer: B. Genes are linked and located on the same chromosome
- A. Genes are located on homologous chromosomes
- B. Genes are linked and located on the same chromosome
- C. Genes are located on non-homologous chromosomes
- D. All of these
Explanation
Independent assortment of genes occurs when genes are located on different chromosomes or far apart on the same chromosome, allowing them to segregate independently during meiosis. Genes located on homologous chromosomes (option A) and non-homologous chromosomes (option C) do not prevent independent assortment. However, genes that are linked and located close together on the same chromosome (option B) tend to be inherited together, preventing independent assortment. Therefore, the correct answer is option B.
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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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