NEET Zoology Reproductive Health Questions Solved

The accompanying diagram shows the uterine tubes of four women (P, Q, R and S):

In which two women is fertilization impossible at present?

(1) P and Q

(2) Q and R

(3) R and S

(4) S and P

(3) Fertilisation in human females takes place at ampullary-isthmic junction.

P: Partial blockage in both fallopian tubes, so it would not affect the mobility of gametes and thus fertilisation can take place.

Q: One fallopian tube is completely blocked but fertilisation can easily take place in the unblocked fallopian tube.

R: Both of the fallopian tubes are completely blocked, hence no fertilisation.

S: Tubectomy has been done which is irreversible thus fertilisation is impossible in this case.

Difficulty Level:

• 7%
• 4%
• 87%
• 4%