CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 14 - MCQExams.com

All of the following associations of germinal tissues and developed tissue are correct except
  • Mesoderm: heart
  • Ectoderm: nervous system
  • Endoderm: lining of intestinal tract
  • Mesoderm: pancreas
  • Ectoderm: epidermis of skin
For a primary spermatocyte in which 2n=What will be the total number of chromatids in each of the secondary spermatocytes?
  • 32
  • 8
  • 16
  • 24
The structure that triggers the thickening of the wall of uterus is
  • Corpus luteum
  • Developing follicle
  • Fallopian tube
  • Hypothalamus
  • Pituitary
The fetal development includes which of the following features?
  • Ductus arteriosus
  • Foramen ovale
  • Fetal hemoglobin with a higher affinity for oxygen than adult hemoglobin
  • A and C
  • A, B and C
Ectoderm: endoderm : : ......... : .............
  • Heart : stomach
  • Retina: lungs
  • Skeletal muscles : liver
  • Skin: Stomach muscle
  • Thyroid: uterus
Mention of transformation event of immature sperm to matured spermatozoa. State the specific location of sertoli cell within testis.
  • Seminiferous tubules
  • Epididymis
  • Tunica albuginea
  • None of the above
Which of the following is true about human gamete formation?
  • The final step of gametogenesis results in the formation of two diploid cells.
  • The result of oogenesis is the formation of four fully functional ova.
  • Spermatogenesis and oogenesis are both regulated by a monthly cycle.
  • Oogenesis occurs throughout the lifetime of a female.
  • Spermatogenesis results in four fully functional sperm cells.
Which of the following is not associated with the blastula stage of embryonic development?
  • It consists of a solid ball of cells
  • It contains a fluid-filled centre called the blastocoel.
  • It is the stage of development that precedes the gastrula.
  • It is a more advanced stage than a morula.
  • It is a less advanced stage than morula.
Select the incorrect statement.
  • FSH stimulates the sertoli cells which help in spermiogenesis.
  • LH triggers ovulation in ovary.
  • LH and FSH decrease gradually during follicular phase.
  • LH triggers secretion of of androgens from Leydig cells.
The secretions of these accessory glands in urethra of male rabbit neutralizes the urinary residue and vaginal acidity.
  • Rectal glands
  • Prostate glands
  • Perineal glands
  • Cowper's glands
Select the correct pair of the germ layer and structure arises from it.
I. Femur
II. Brainstem
III. Lungs
  • I = endoderm; II = ectoderm; III = mesoderm
  • I = endoderm; II = mesoderm; III = ectoderm
  • I = ectoderm; II = endoderm; III = mesoderm
  • I = mesoderm; II = endoderm; III = ectoderm
  • I = mesoderm; II = ectoderm; III = endoderm
The portion of the endometrium that covers the embryo and is located between the embryo and the uterine cavity is the
  • Desidua basalis
  • Desidua umbilicus
  • Desidua capsularis
  • Decidua functionalis
The correct sequence of events during embryonic development is
  • Cleavage - differentiation - fertilization - gastrulation
  • Differentiation - fertilization - gastrulation - cleavage
  • Fertilization - cleavage - gastrulation - differentiation
  • Fertilization - differentiation - cleavage - gastrulation
  • Fertilization - gastrulation - differentiation - cleavage
All of the following statements about the menstrual cycle are true except
  • Luteinizing hormone is produced by the pituitary in response to GNRH from the hypothalamus.
  • Luteinizing hormone acts on the follicle, causing ovulation.
  • Birth control pills that contain estrogen and progesterone would inhibit the secretion of FSH by the pituitary.
  • The endometrium builds up to its maximum thickness soon after the release of FSH.
  • Progesterone helps maintain the corpus luteum after ovulation.
Indicate the correct sequence during spermatogenesis.
  • Spermatozoa $$\rightarrow$$ spermatogonia $$\rightarrow$$ spermatid $$\rightarrow$$ spermatocyte
  • Spermatogonia $$\rightarrow$$ spermatocyte $$\rightarrow$$ spermatid $$\rightarrow$$ spermatozoa
  • Spermatid $$\rightarrow$$ spermatocyte $$\rightarrow$$ spermatozoa $$\rightarrow$$ spermatogonia
  • Spermatocyte $$\rightarrow$$ spermatozoa $$\rightarrow$$ spermatid $$\rightarrow$$ spermatogonia
During embryological development, one cell will influence another group and establish a pathway of events leading to gastrulation. This is influenced by a process known as
  • Embryonic induction
  • Transcription
  • Embryonic transduction
  • Blastulation
Number of foetal membranes in humans is?
  • $$2$$
  • $$3$$
  • $$4$$
  • $$1$$
Arrange the layer of ovum in chronological order from inside to outside.
  • Zona pellucida, Vitelline membrane and Corona radiata
  • Corona radiata, Zona pellucida and Vitelline membrane
  • Corona radiata, Vitelline membrane and Zona pellucida
  • Vitelline membrane, Zona pellucida and Corona radiata
Conversion of blastula into gastrulla is 
  • Cleavage
  • Morphogenesis
  • Differentiation
  • Reproduction
Meiosis during sperm formation of Ascaris, was first observed by
  • Fleming
  • Boveri
  • Brauer
  • De Vries
  • Abbe
Umbilical cord contain
  • Umbilicus
  • Placenta
  • Discus proligerus
  • Allantoic artery and vein
Which of the following statement is correct?
  • Cleavage follows gastrulation.
  • Yolk content of egg has no role in cleavage.
  • Cleavage is repeated mitotic division of zygote.
  • Gastrulation and blastulation follow each other.
Spermatids are formed after the second meiotic division from secondary spermatocytes. The ploidy of the secondary spermatocytes is
  • $$n$$
  • $$2n$$
  • $$3n$$
  • $$4n$$
Which option is correct for the region labelled as A and B in the given diagram?

677592_67f4347c5cfe4521b1df80957a9dbcb1.png
  • A-Meiosis B-Spermatid
  • A-Mitosis B- Primary spermatocyte
  • A-Mitosis B-Spermatid
  • A-Meiosis B-Primary spermatocyte
Secretions from which one of the following is rich in fructose, calcium and some enzymes
  • Male accessory glands
  • Pancreas
  • Liver
  • Salivary glands
Which of the following is haploid?
  • Spermatogonial cells
  • Germinal epithelial cells
  • Secondary spermatocytes
  • Primary spermatocytes
During development which of the following organs is formed first?
  • Heart
  • Brain
  • Neural tube
  • Skin
Which of the following hormone is associated with the production of androgens?
  • ICSH
  • ACTH
  • TSH
  • ADH
In spermatogenesis, the phase of maturation involves
  • Growth of spermatogonia into spermatocytes
  • Formation of spermatogonia from gonocytes through mitosis
  • Formation of spermatids from primary spermatocytes through meiosis
  • Formation of oogonia from spermatocytes through meiosis
Early embryonic developmental stages constitute
  • Functional state
  • Prefunctional state
  • Transitional growth
  • Fundamental growth
Which one holds corona radiata?
  • Mucopolysaccharide
  • Oligosaccharide
  • Lipopolysaccharide
  • Lipoprotein
Select the correct set of name for the parts A,B, C, D. 
 A Ureter Seminal vesicle Prostate Bulbourethral gland
 B Ureter Prostate Seminal vesicle  Bulbourethral gland
 C Vas deferens Seminal vesicle Prostate Bulbourethral gland
 D Vas deferens Seminal vesicle Bulbourethral glandProstate 

684619_3647e57b009548edbb2f6f6491da579e.png
  • A
  • B
  • C
  • D
How many sperms are present in an average $$3$$ml ejaculation?
  • $$200$$ million
  • $$300$$ million
  • $$500$$ million
  • $$800$$ million
Which of the following correctly paired with is its function?
  • Fimbriae - Collection of ovum before ovulation
  • Bartholin glands - Secrete alkaline fluid to destroy the acidity of urethra
  • Ovary - Synthesis and Secretion of steroid hormones
  • Relaxin - Responsible for narrowing of pelvic cavity
If the epididymis is not presented then what will happen _____________.
  • Sperm life cycle is short
  • Early cross the pathway
  • Functional maturation is early
  • Sperm wilt be incapable for fertilization
The spermiogenesis is the process by which spermatozoa are formed from
  • Spermatid
  • Spermatogonia
  • Primary spermatocyte
  • Secondary oocyte
Lanugo is
  • Feather at junction of rachis and quill
  • A centrum feather present on tail region
  • Coating of hair on epidermis of man
  • A coating of fine hair with which the body of mammals is covered during foetal development
Spermatogenesis in mammalian testes is controlled by
  • Follicle stimulating hormones
  • Growth hormones
  • Luteinizing hormones
  • Estrogens
What is height and weight of twelve week old human embryo?
  • 7.5 cm, 650 gm
  • 42 cm, 1800 gm
  • 7.5 cm, 14 gm
  • 32 cm, 650 gm
If mammalian ovum fails to get fertilized, which one of the following is unlikely to happen?
  • Corpus luteum will disintegrate
  • Progesterone secreation rapidly declines
  • Estrogen secreation increases
  • Primary follicle starts developing
During implantation, the blastocyst is completely buried inside endometrium. This proves that human placenta is :
  • Discoidal
  • Interstitial
  • Haemochorial
  • Bidicoidal
Leydig cells in adult mammals produce which one of the following hormones?
  • Estrogen
  • Testosterone
  • Progesterone
  • Follicle stimulating hormone
Choose the correct answers from the alternatives given.
In implantation, which of the following burrows into the endometrium
  • Zygote
  • Blastocyst
  • Gastrula
  • Morula
Where does in the human male spermatogenesis occur?
  • Ovaries
  • Testes
  • Epididymis
  • Prostate gland
Cleavage is a unique form of mitotic cell division in that
  • The nucleus does not participate
  • No spindle develops to guide the chromosomes
  • The plasma membranes of daughter cells do not separate
  • There is no growth of cells
The hollow ball of cells formed from cleavage is called
  • Blastomere
  • Morula
  • Blastula
  • Blastocoel
Leydig cells in adult mammals produce
  • Estrogen
  • Testosterone
  • Progesterone
  • Follicle stimulating hormone
The immediate predecessors of spermatids are
  • Spermatogonia
  • Sperm mother cells
  • Primary spermatocytes
  • Secondary spermatocytes
Choose the correct answers from the alternatives given.
During development, spermatozoa are nourished by
  • fructose
  • cells of Leydig
  • mitochondria
  • Sertoli cells
Choose the correct answers from the alternatives given.
Which of the following is mismatched?
  • Brain-ectoderm
  • Lens-endoderm
  • Gut-endoderm
  • Bone-mesoderm
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