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Reproduction and development
9 MDCAT Biology questions with answers and explanations.
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Fertilisation in humans normally takes place in the:
- 1 Uterus
- 2 Fallopian tube
- 3 Vagina
- 4 Ovary
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Correct answer: Fallopian tube
The sperm usually meets the egg in the upper part of the fallopian tube.
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Which hormone from the corpus luteum maintains the lining of the uterus?
- 1 Progesterone
- 2 Testosterone
- 3 FSH
- 4 Oxytocin
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Correct answer: Progesterone
Progesterone keeps the endometrium thick and ready for implantation.
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The surge of luteinising hormone (LH) triggers:
- 1 Menstruation
- 2 Ovulation
- 3 Implantation
- 4 Lactation
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Correct answer: Ovulation
A sharp rise in LH around the middle of the cycle makes the mature follicle release the egg.
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In males, spermatogenesis occurs in the:
- 1 Epididymis
- 2 Prostate gland
- 3 Seminiferous tubules
- 4 Vas deferens
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Correct answer: Seminiferous tubules
Sperm are made in the coiled seminiferous tubules of the testes.
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How many sperm cells are formed from one primary spermatocyte?
- 1 1
- 2 2
- 3 4
- 4 8
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Correct answer: 4
Meiosis I and II give four haploid cells, and each becomes a sperm.
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How many functional egg cells come from one primary oocyte?
- 1 1
- 2 2
- 3 3
- 4 4
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Correct answer: 1
Divisions of an oocyte are uneven. Only one large egg forms and the other cells are small polar bodies.
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Double fertilisation is a feature of:
- 1 Gymnosperms
- 2 Angiosperms
- 3 Ferns
- 4 Mosses
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Correct answer: Angiosperms
In flowering plants one sperm fertilises the egg and the other joins the central cell.
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In flowering plants, the endosperm forms when a sperm nucleus fuses with:
- 1 The egg cell
- 2 Two polar nuclei
- 3 The synergids
- 4 The antipodal cells
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Correct answer: Two polar nuclei
A sperm nucleus fuses with the two polar nuclei, giving a triploid endosperm tissue that feeds the embryo.
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Which hormone is detected by a standard pregnancy test?
- 1 Oestrogen
- 2 hCG
- 3 Insulin
- 4 Prolactin
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Correct answer: hCG
Human chorionic gonadotropin (hCG) is made by the developing placenta and appears in the urine of pregnant women.