Fertilisation and Implantation - Unsolved Practice Set
Chapter: Human Reproduction | Topic: Fertilisation and Implantation
FERTILISATION AND IMPLANTATION - UNSOLVED PRACTICE SET
Topic: Fertilisation and Implantation
Multiple Choice Questions
Q1. Fertilisation of the ovum by the sperm normally takes place in the:
- Uterus
- Ampullary-isthmic junction of the fallopian tube
- Cervix
- Ovary
Q2. The chromosomal sex of a baby is determined by:
- The type of sperm (X- or Y-bearing) that fertilises the egg
- The type of egg alone
- Hormones from the mother
- The stage of the menstrual cycle
Q3. Which layer of the blastocyst attaches to the endometrium during implantation?
- Inner cell mass
- Trophoblast
- Zona pellucida
- Blastocoel
Q4. The process by which sperm gain the ability to fertilise the ovum inside the female reproductive tract is called:
- Capacitation
- Acrosomal reaction
- Cleavage
- Implantation
Q5. Implantation of the blastocyst typically occurs approximately how many days after fertilisation?
- 1-2 days
- 7 days
- 14 days
- 21 days
Short Answer Questions
Q6. What is capacitation, and where does it occur?
Q7. Briefly explain why the sex of a baby depends on the father's sperm rather than the mother's egg.
Q8. What is a blastocyst? Name its two main parts.
Q9. Define implantation, and mention where in the uterus it typically occurs.
Long Answer Questions
Q10. Describe the sequence of events, from the entry of sperm into the female reproductive tract to the formation of a zygote.
Q11. Explain the process by which a fertilised egg travels to the uterus and eventually implants into the endometrium.
APPLICATION / ANALYSIS
Q12. A couple is told by their doctor that the probability of having a boy or a girl in each pregnancy is roughly 50:50. Using your understanding of fertilisation and sex determination, explain the biological reasoning behind this statistic.
Q13. In some cases, a fertilised egg fails to reach the uterus in time and implants within the fallopian tube itself, resulting in a dangerous condition. Using your understanding of the normal timeline of zygote transport, suggest what might delay the zygote's movement towards the uterus in such cases.