The accompanying diagram shows the uterine tubes of four women ($P, Q, R$ and $S$).
In which two women is fertilisation impossible at present?
Updated On: Jul 7, 2022
$P$ and $Q$
$Q$ and $R$
$R$ and $S$
$S$ and $P$
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The Correct Option isC
Solution and Explanation
Figure $'R'$ is showing complete blockage of Fallopian tubes and figure$S'$ is showing tubectomy which is a surgical method of contraception in females. When both the Fallopian tubes are blocked or cut and tied, there will be no transport of gametes and thus no fertilisation.
Fertilization happens when a sperm fuses with the female act during sexual intercourse and further forms an egg that gets implanted in the uterus of the female. The sperm goes through the fallopian tube and penetrates the zona pellucida layer of the ovum (female egg) and then fuses with it which forms a zygote (fertilized egg). Thousand of sperms are generated in a male body to compensate for the ones unfit and non-motile ones. Once the zygote is created or formed, it gets implanted in the uterus and further growth starts taking place when cells start dividing and forming tissues, and tissues further form organs which result in the formation of an organ system, eventually or in time turning into an organism.
