Looking for classes? Ksquare Career Institute, Bengaluru →
Biology
Human Reproduction
116 questions from 38 papers, each with its answer.
- 116 questions
- 38 papers
- 3.29% of Biology
Pregnancy and Embryonic Development
-
Find the correct statements:
A. In human pregnancy, the major organ systems are formed at the end of 12 weeks.
B. In human pregnancy the major organ systems are formed at the end of 8 weeks.
C. In human pregnancy heart is formed after one month of gestation.
D. In human pregnancy, limbs and digits develop by the end of second month.
E. In human pregnancy the appearance of hair usually observed in the fifth month.
Choose the correct answer from the options given below:Statements A, C, D, and E are correct embryological milestones from NCERT.
During human gestation: Heart is formed after 1 month (C); limbs and digits develop by end of 2nd month (D); major organ systems and external genitalia are formed by end of 12 weeks/first trimester (A); first movements and hair on head appear during the 5th month (E). Thus, A, C, D, and E are correct.
Gametogenesis (Spermatogenesis vs Oogenesis)
-
Consider the following:
A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.
Choose the correct answer from the options given below:A and B are true: female meiosis starts in fetal life; gap between meiosis I and II spans years in females vs hours/days in males.
Oogenesis initiates embryonic life before birth, whereas spermatogenesis starts only at puberty (A is true). In females, meiosis I arrests in prophase I until ovulation decades later, so the interphase gap between meiosis I and II is dramatically prolonged compared to males (B is true). First polar body forms during secondary oocyte formation, and LH surge triggers ovulation, not endometrial breakdown.
Menstrual Cycle
-
The first menstruation is called:
The onset of menstruation at puberty in human females is menarche.
The initiation of the first menstrual cycle at puberty in human females is termed menarche. Permanent cessation around age 50 is known as menopause.
Fertilization and Twinning
-
Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
Opposite-sex twins must arise from two separate ova and sperm, making them fraternal (dizygotic) twins.
Monozygotic (identical) twins develop from a single zygote and must have the same sex and karyotype (both male or both female). A boy and a girl twin set must arise from two distinct fertilizations (dizygotic/fraternal twins).
Structure of Sperm
-
Match List-I with List-II.
Pick the matching item from Column II for each row.
Column I
- A. Head
- B. Middle piece
- C. Acrosome
- D. Tail
Column II
- I. Enzymes
- II. Sperm motility
- III. Energy
- IV. Genetic material
Correct answer: A → IV, B → III, C → I, D → II
A-IV, B-III, C-I, D-II.
The sperm head houses the haploid genetic nucleus (IV). The middle piece contains mitochondria producing ATP energy (III). The acrosome contains hydrolytic enzymes for fertilization (I). The tail provides flagellar motility (II).
That is every question in Human Reproduction for this filter.
Want a score?
Answers here are not saved. Practise as a test to be marked and see your progress.
Practise as a test