45 practice MCQs on sexual and asexual reproduction, the human reproductive system, fertilization, embryo development and reproduction in plants. Every question has the correct answer and an explanation.
Start free — 20 questionsReproduction is part of the MDCAT Biology syllabus. This page collects Reproduction MCQs in the style of past MDCAT papers — below are 12 of them with answers and explanations, and the full set of 45 questions is in the HighYield MDCAT QBank.
This chapter covers: sexual and asexual reproduction, the human reproductive system, fertilization, embryo development and reproduction in plants.
Correct answer: D. Cloning
Cloning is the production of genetically identical copies of an organism through asexual reproduction, without fusion of gametes.
Correct answer: A. Zygospore
In Rhizopus, the zygote develops into a thick-walled, dormant resistant structure called a zygospore.
Correct answer: B. Decrease in Level of Progesterone
A sharp decrease in progesterone (and oestrogen) levels at the end of the menstrual cycle causes the endometrium to break down, resulting in menstruation.
Correct answer: D. Spermatid
Spermatids differentiate directly into mature spermatozoa through a maturation process called spermiogenesis.
Correct answer: B. FSH
At puberty, follicle-stimulating hormone (FSH) stimulates the development of primary follicles within the ovary.
Correct answer: C. Oestrogen
In females, FSH stimulates ovarian follicles to grow and produce oestrogen.
Correct answer: A. Spirochete
Syphilis is caused by a spirochete, a spiral-shaped bacterium (Treponema pallidum).
Correct answer: A. 3-7 days
Menstrual bleeding might happen every 21 to 35 days and last 3 to 7 days. For the first few years after menstruation begins, long cycles are common. However, menstrual cycles tend to shorten and become more regular as people age.
Correct answer: A. Uterus
In human females, the small, pear-shaped, muscular, distensible, sac-like organ where gestation takes place is UterusThe uterus is where fertilized eggs implant and develop into embryos and fetuses during pregnancy. It plays a crucial role in supporting the growth and development of the developing fetus until birth. The fallopian tubes (Option C) are where fertilization typically occurs, but gestation does not take place in the fallopian tubes. Kidneys (Option B) and the stomach (Option D) are not directly involved in gestation and pregnancy.
Correct answer: C. Primary spermatocytes
Primary spermatocytes are diploid cells in the testes formed from spermatogonia. They undergo meiosis I to produce two haploid secondary spermatocytes. Primary spermatocytes are located in the seminiferous tubules and are essential for sperm production.
Correct answer: C. Scrotum
Option C is correct.The testes are male gonads which are situated outside the abdomen within a skin pouch called scrotum. The scrotum is a pouch of skin that hangs below the penis. It contains the testes, epididymis, and part of the vas deferens.The epididymis is a long, coiled tube that lies along the back of each testis. It stores and matures sperm.The vas deferens is a tube that carries sperm from the epididymis to the ejaculatory duct.The vasa efferentia are a series of thin tubes that carry sperm from the testes to the epididymis.
Correct answer: D. Epididymis
The epididymis is a coiled tube located at the back of each testis. Its primary function is to store and mature sperm produced in the testes. Sperm travel from the seminiferous tubules of the testes to the epididymis, where they undergo maturation, gaining motility and the ability to fertilize an egg. The epididymis also reabsorbs excess fluid and damaged sperm. During ejaculation, sperm are propelled from the epididymis into the vas deferens for transport.
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