Match List-I with List-II
| List-I | List-II |
|---|---|
| Term | Feature |
| (A) Multiple alleles | (I) Variation in DNA |
| (B) Mendelian disorder | (II) Non segregation of chromatids during cell division |
| (C) Chromosomal disorder | (III) Pedigree analysis |
| (D) Mutation | (IV) Population study |
Choose the correct answer from the options given below.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
(A) Multiple alleles — this matches (IV) Population study. One person carries only two alleles of a gene. The other alleles show up only when a whole population is studied, as for the three alleles of the ABO blood group gene.
(B) Mendelian disorder — this matches (III) Pedigree analysis. These disorders come from a change in one gene and pass down by Mendel’s laws, so their pattern can be traced through a family tree.
(C) Chromosomal disorder — this matches (II) Non segregation of chromatids during cell division. When chromatids fail to separate, a cell gains or loses a chromosome, as in Down’s syndrome.
(D) Mutation — this matches (I) Variation in DNA. A mutation is a change in the DNA sequence, which changes the genotype and often the phenotype.