List I (Sub Phases of Prophase I) | List II (Specific characters) | ||
A | Diakinesis | I | Synaptonemal complex formation |
B | Pachytene | II | Completion of terminalisation of chiasmata |
C | Zygotene | III | Chromosomes look like thin threads |
D | Leptotene | IV | Appearance of recombination nodules |
List I (Spectral Lines of Hydrogen for transitions from) | List II (Wavelength (nm)) | ||
A. | n2 = 3 to n1 = 2 | I. | 410.2 |
B. | n2 = 4 to n1 = 2 | II. | 434.1 |
C. | n2 = 5 to n1 = 2 | III. | 656.3 |
D. | n2 = 6 to n1 = 2 | IV. | 486.1 |
The following diagram shown restriction sites in E. coli cloning vector pBR322. Find the role of ‘X’ and ‘Y’gens :