STD 12 - 2. human reproduction — BIOLOGY STD 12 Science — Question

$I$. They inhibit ovulation and implantation

$II$. They alter the quality of cervical mucous to prevent or retard the entry of sperms

$III$. They prevent the ejaculated semen from entering the female vagina

$IV$. They inhibit spermatogenesis

$I.$ 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