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Human Reproduction — NEET MCQs with answers
Humans are sexually reproducing and viviparous; reproductive events include gametogenesis, insemination, fertilisation, implantation, gestation and parturition. The testes produce sperms by spermatogenesis, while one ovum is released per menstrual cycle; fertilisation occurs in the ampulla of the fallopian tube, the zygote divides to form a blastocyst that is implanted in the uterus, and the fetus is connected to the mother through the placenta over about 9 months of pregnancy. Parturition is induced by a complex neuroendocrine mechanism involving oxytocin, and is followed by lactation to feed the newborn.
Topics in this chapter
- 2.1 The Male Reproductive System
- 2.2 The Female Reproductive System
- 2.3 Gametogenesis
- 2.4 Menstrual Cycle
- 2.5 Fertilisation and Implantation
- 2.6 Pregnancy and Embryonic Development
- 2.7 Parturition and Lactation
Free practice questions
A zygote carrying the XX combination of sex chromosomes will develop into a:
- A. Twins
- B. Female baby
- C. Male baby
- D. Sterile individual
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Answer: B — NCERT: the zygote carrying XX would develop into a female baby and XY would form a male.
NCERT Class 12 Biology Ch 2.5
Which structure is described by NCERT as receiving sperms directly from the seminiferous tubules?
- A. Ejaculatory duct
- B. Epididymis
- C. Rete testis
- D. Urethra
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Answer: C — NCERT: the seminiferous tubules of the testis open into the vasa efferentia through the rete testis; thus the rete testis directly receives from the tubules.
NCERT Class 12 Biology Ch 2.1
In males, the process of sperm formation from spermatogonia is called:
- A. Spermiation
- B. Oogenesis
- C. Spermatogenesis
- D. Ovulation
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Answer: C — NCERT states spermatogonia produce sperms by spermatogenesis that begins at puberty.
NCERT Class 12 Biology Ch 2.3
In the absence of fertilisation, the corpus luteum:
- A. Degenerates
- B. Transforms into a Graafian follicle
- C. Secretes more progesterone
- D. Enlarges further
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Answer: A — NCERT: In the absence of fertilisation, the corpus luteum degenerates.
NCERT Class 12 Biology Ch 2.4
The placenta facilitates the removal of which substances produced by the embryo?
- A. Estrogens and progesterone
- B. Oxygen and glucose
- C. Amino acids and vitamins
- D. Carbon dioxide and excretory/waste materials
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Answer: D — NCERT states the placenta facilitates removal of carbon dioxide and excretory/waste materials produced by the embryo.
NCERT Class 12 Biology Ch 2.6
The last part of the oviduct, which has a narrow lumen and joins the uterus, is the:
- A. Isthmus
- B. Infundibulum
- C. Ampulla
- D. Fimbriae
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Answer: A — NCERT states that the last part of the oviduct, isthmus, has a narrow lumen and it joins the uterus.
NCERT Class 12 Biology Ch 2.2
A doctor injects a hormone to induce delivery in a full-term pregnant woman. Based on NCERT, which hormone would be most appropriate?
- A. Insulin
- B. Thyroxine
- C. Prolactin
- D. Oxytocin
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Answer: D — NCERT explains that oxytocin acts on the uterine muscle to cause stronger contractions leading to parturition; the text prompts that doctors inject a hormone to induce delivery, which is oxytocin.
NCERT Class 12 Biology Ch 2.7
Which type of cell division occurs during cleavage of the zygote?
- A. Meiosis
- B. Amitosis
- C. Mitosis
- D. Both meiosis and mitosis
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Answer: C — NCERT: the mitotic division starts as the zygote moves through the isthmus — cleavage consists of mitotic divisions.
NCERT Class 12 Biology Ch 2.5
How many chromosomes does each diploid spermatogonium contain?
- A. 46
- B. 23
- C. 92
- D. 69
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Answer: A — NCERT states each spermatogonium is diploid and contains 46 chromosomes.
NCERT Class 12 Biology Ch 2.3
The seminal plasma is rich in fructose, calcium and:
- A. Estrogens
- B. Certain enzymes
- C. Antibodies
- D. Androgens
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Answer: B — NCERT: seminal plasma is rich in fructose, calcium and certain enzymes.
NCERT Class 12 Biology Ch 2.1
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