Fertilisation and Early Development in Biology

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What is the role of testosterone and estrogen in the development of secondary sexual characteristics during puberty?

They induce changes like the growth of pubic hair and maturation of sexual organs.

What is the process of fusion between a male gamete and a female gamete called?

Fertilisation

What is a primary sexual characteristic?

Differences in reproductive organs between males and females during development.

What is the function of the umbilical cord in the development of a fetus?

Carries deoxygenated blood and waste products from the fetus to the placenta

During the menstrual cycle, what does FSH secreted by the Pituitary Gland stimulate?

Maturation of one follicle in the ovary.

What is the function of amniotic fluid during pregnancy?

Protects the fetus against mechanical shock, drying out, and temperature fluctuations

What is a characteristic feature of sperm (male gamete)?

Small in size

Which part of the female reproductive system is responsible for exchange of soluble materials between mother and fetus?

Placenta

What is a secondary sexual characteristic?

Changes that occur during puberty, like growth of pubic hair.

What process occurs when the zygote divides over and over to form a ball of cells called an embryo?

Mitosis

What are the key differences between primary and secondary sexual characteristics?

Primary are present during development, while secondary occur during puberty as children become adolescents.

What is the function of flagellum in sperm cells?

Propels the sperm to swim.

What hormone is secreted by the Corpus Luteum to keep the endometrium thick, waiting for possible embryo implants?

Progesterone

On which day of the menstrual cycle does ovulation typically occur?

Day 14

What triggers the release of the egg from the follicle into the fallopian tube?

LH

What hormone is secreted by the follicle and ovarian tissues to prepare the endometrium?

Oestrogen

In which scenario does the Corpus Luteum degenerate due to lack of progesterone?

Egg not fertilized

Which hormone triggers the formation of Corpus Luteum in the ovary?

LH

Test your knowledge on the process of fertilisation and early development in biology, including the fusion of male and female gametes, zygote formation, embryo development, and implantation. This quiz is particularly relevant for CAIE IGCSE Biology students.

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