Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET Medical202624 April 2026Evening ShiftBiologyHuman ReproductionActual

During early embryonic development in humans, which of the following options shows the correct sequence of the various events given below. I. Formation of hypoblast and epiblast II. Appearance of primitive streak III. Differentiation of cytotrophoblast and syncytiotrophoblast. IV. Formation of amnion

Options

  1. AIII I IV II
  2. BII III IV I
  3. CI III II IV
  4. DIV I III II

Correct answer

A. III I IV II

Step-by-step solution

During early embryonic development, implantation starts around the 7th to 8th day. The trophoblast first differentiates into two layers: an inner cytotrophoblast and an outer syncytiotrophoblast (III). Around the 8th day, the inner cell mass (embryoblast) differentiates into a bilaminar embryonic disc consisting of two layers: the hypoblast and the epiblast (I). Following this, a small cavity appears within the epiblast, which enlarges to form the amniotic cavity. The epiblast cells adjacent to the cytotrophoblast

Practice Human Reproduction on Quantrex Academy →

More from Human Reproduction

Which of the following pair of animals indicates continuous breeder? 2026The process of fertilization of a human egg can be confirmed by the presence of __________. 2026Which of the following cells undergoes meiosis II in gametogenesis? 2026Given below are two statements. Statement I - The external genitalia of female contains two thin folds called labia majora which forms hood-like covering around clitoris. Statement 2026Trophoblast cells in contact with the embryonal knob are called ________ . 2026Match phases of menstruation in column I with events occurring during respective phase in column II and select the correct option. Column I Column II A. Menstrual phase I. rupturin 2026Select the correct sequence with respect to the process of spermatogenesis. a) Primary spermatocyte b) Primordial cell c) Secondary spermatocyte d) Spermatogonia e) Spermatids 2026How many spermatozoa will be formed from 100 primary spermatocytes? 2026 Full Human Reproduction list All MHT CET Medical PYQs