Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

$R$ - Methanogens are used for fermentingmalted cereals and fruit juices to produceethanol.

$I.$ It is phenomenon in which more recombinants are produced in $F_{2}$-generation

$II.$ More parental combination are produced in $F_{2}$-generation

$III.$ Genotype which are present in $F_{1}$ hybrid. Reappear in high frequency in $F_{2}$-generation

$IV.$ It is a phenomenon in which two chromosome are linked

       $(i)$ Avoid sex with unknown partners

       $(ii)$ Use condoms during coitus

       $(iii)$ Blood transfusion

       $(iv)$ All of these