In which situation are genes, are not assorted independently, during meiosis in a chromosome?
Correct answer: A. When genes are linked and their loci are close to each other
- A. When genes are linked and their loci are close to each other
- B. When some genes have mutated on the chromosome
- C. When there are too many Genes on a chromosome
- D. When genes are not linked and their loci are far apart
Explanation
According to the law of independent assortment, the alleles of two or more different genes get sorted into gametes independently of one another, i.e. the allele, a gamete receives for one gene, does not influence the allele received for another gene. Hence, two different traits or genes are inherited separately or independent of each other. For genes to NOT assort independently, this implies that they are inherited TOGETHER, i.e. are linked. This is more likely to occur when the positions of the genes (i.e. their loci) are close to each other on one chromosome. This scenario is only described by option A.
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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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