CBSE Class 12 (Science) Human Reproduction — practice questions
93 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 (Science) Human Reproduction in the app →Fertilisation in humans typically occurs in theOogenesis in humans beginsOvulation in a typical 28-day human menstrual cycle occurs around dayTypical duration of human pregnancy is approximatelyThe hormone detected by home pregnancy tests isThe first milk produced after birth, rich in antibodies, is calledA single spermatogonium ultimately produces how many functional sperm cells?A single primary oocyte produces how many functional egg cells after meiosis?Fertilisation in humans typically occurs in:The average length of the human menstrual cycle is:The LH SURGE triggers which key event in the menstrual cycle?Human pregnancy lasts approximately:The hormone that drives uterine contractions during childbirth (parturition) is:Colostrum (the first milk after childbirth) is rich in:The testes are held outside the abdominal cavity in a pouch called the:The scrotum keeps the testes at a temperature that is:Each testis contains about how many testicular lobules?Sperms are produced inside coiled tubes called:A seminiferous tubule is lined by Sertoli cells and:Male germ cells form sperm by divisions that are:Sertoli cells in the tubule provide the germ cells with:Regions outside the seminiferous tubules are called:Interstitial cells of the testis are also known as:The primary female sex organs are the:The female accessory ducts are the uterus, vagina and the:Each fallopian tube measures about:The funnel-shaped part of the oviduct near the ovary is the:Finger-like projections at the edge of the infundibulum are the:The wider middle part of the oviduct is called the:The narrow last part of the oviduct joining the uterus is the:Another name for the uterus is the:The shape of the uterus is compared to an inverted:The uterus opens into the vagina through a narrow:The cervical canal together with the vagina forms the:The wall of the uterus is made of how many tissue layers?The inner glandular layer of the uterus is the:Why are the human testes housed outside the abdominal cavity in a scrotum?About how many testicular lobules does each human testis contain?Which cells inside the seminiferous tubules nourish the developing germ cells?The interstitial Leydig cells of the testis synthesise and secrete which hormones?Through which structure do seminiferous tubules open into the vasa efferentia?Which male duct lies along the posterior surface of each testis?The vas deferens joins a duct from the seminal vesicle to form which duct?What covers the enlarged end of the penis, the glans penis?Which sugar is abundant in the seminal plasma secreted by male accessory glands?Secretions of the bulbourethral glands mainly help in which function?What do the ovaries, the primary female sex organs, produce?Into which two zones is the ovarian stroma divided?Which funnel-shaped part of the fallopian tube lies closest to the ovary?What is the function of the fimbriae at the edge of the infundibulum?Which part of the oviduct has a narrow lumen and joins the uterus?The human uterus is shaped like which of the following?Which uterine layer shows strong contractions during delivery of the baby?Which part of the female external genitalia is a cushion of fatty tissue?Which statement about the hymen is correct?Into how many mammary lobes is the glandular tissue of each breast divided?Which cells of the mammary gland secrete milk?The mammary ampulla is connected to which duct that opens at the nipple?How many chromosomes does a human spermatogonium contain?How many chromosomes are present in each secondary spermatocyte?What is the transformation of spermatids into sperms called?What is the release of sperms from the seminiferous tubules called?Which hypothalamic hormone increases at puberty to start spermatogenesis?On which cells does luteinising hormone act in the male?FSH acts on which testicular cells to aid spermiogenesis?The cap-like acrosome on the sperm head is filled with what?Which part of a sperm contains numerous mitochondria?About how many sperms does a human male ejaculate during one coitus?For normal fertility, at least what share of sperms must show vigorous motility?When are the oogonia formed in a human female?At which stage are primary oocytes temporarily arrested?About how many primary follicles remain in each ovary at puberty?The first meiotic division of a primary oocyte gives what?What is the membrane that surrounds the secondary oocyte called?What does the Graafian follicle release at ovulation?What name is given to the first menstruation at puberty?How long does the menstrual flow usually last?What causes the menstrual flow?What induces rupture of the Graafian follicle and ovulation mid-cycle?Which hormone from the corpus luteum maintains the endometrium?Around what age do human menstrual cycles cease at menopause?In which part of the fallopian tube does fertilisation normally take place?What prevents more than one sperm from fertilising an ovum?Sperm entry induces completion of which division in the oocyte?What is an embryo with 8 to 16 blastomeres called?The outer layer of cells in a blastocyst is called what?Embedding of the blastocyst in the endometrium is called what?Which finger-like projections on the trophoblast help form the placenta?Which hormone is produced in women only during pregnancy?The inner cell mass first differentiates into which two layers?By when is the human embryo's heart formed?In which month are first foetal movements and head hair usually seen?Which hormone released by the maternal pituitary strengthens uterine contractions at birth?