Linkage & Gene Mapping — NEET Biology
📚 Practice ConceptAfter knowing that the genes are located on the chromosomes, a good correlation was drawn between Mendel's laws: segregation and assortment of chromosomes during meiosis. The Mendel's laws were extended in the form of 'Chromosomal Theory of Inheritance'. Later, it was found that Mendel's law of independent assortment does not hold true for the genes that were located on the same chromosomes. These genes were called as 'linked genes'. Closely located genes assorted together, and distantly located genes, due to recombination, assorted independently. Linkage maps, therefore, corresponded to arrangement of genes on a chromosome.
Consider chromosomal interpretation of Mendel’s results: (1) Chromosomes and genes both occur in pairs and segregate during gametogenesis. (2) Independent assortment arises from independent alignment of bivalents in meiosis I. (3) Morgan observed deviation from 9:3:3:1 when genes were on the same chromosome. (4) Such deviation is due to physical association (linkage) increasing parental combinations. (5) Therefore, independent assortment applies equally to linked genes. Which statements are correct?
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.