Reproduction in Organisms NEET PYQs (1989–2026)

Solved Reproduction in Organisms PYQs

3 recent questions with answers. The full set of 33 is free to practise.

1. NEET 2023HardEvents in Sexual Reproduction
   Q1

   Arrange the sequence of different hormones for their role during gametogenesis.
   
   (A) Gonadotropin LH stimulates synthesis and secretion of Androgen
   
   (B) Gonadotropin releasing hormone from hypothalamus
   
   (C) Androgen stimulates spermatogenesis
   
   (D) Gonadotropin FSH helps in the process of spermiogenesis
   
   (E) Gonadotropins from anterior pituitary gland.
   
   Choose the correct answer from the options given below : [NEET 2023 mpr]

   • A(E),(A),(D),(B),(C)
   • B(C), (A), (D), (E), (B)
   • C(B), (E), (A), (C), (D)
   • D(D), (B), (A), (C), (E)

   Show answer & solution

   Correct answer: (C)

   The correct sequence of hormones during gametogenesis is as follows :
   
   (B) Gonadotropin-releasing hormone from hypothalamus : This is the first step as the hypothalamus releases gonadotropin-releasing hormone (GnRH).
   
   (E) Gonadotropins from the anterior pituitary gland : GnRH stimulates the anterior pituitary to release gonadotropins, luteinizing hormone (LH), and follicle-stimulating hormone (FSH).
   
   (A) Gonadotropin LH stimulates synthesis and secretion of androgen : LH stimulates the Leydig cells in the testes to produce androgens.
   
   (C) Androgen stimulates spermatogenesis : Androgens, such as testosterone, stimulate the process of spermatogenesis.
   
   (D) Gonadotropin FSH helps in the process of spermiogenesis : FSH stimulates the Sertoli cells in the testes, which help in the process of spermiogenesis, the transformation of spermatids into mature spermatozoa.
   
   So, the correct answer is Option C : (B), (E), (A), (C), (D).
2. NEET 2023HardSexual Reproduction
   Q2

   Select the correct statement/s with respect to mechanism of sex determination in Grasshopper.
   
   (A) It is an example of female heterogamety.
   
   (B) Male produces two different types of gametes either with or without X chromosome.
   
   (C) Total number of chromosomes (autosomes and sex chromosomes) is same in both males and females.
   
   (D) All eggs bear an additional X chromosome besides the autosomes.
   
   Choose the correct answer from the options given below : [NEET 2023 mpr]

   • A(B) and (D) only
   • B(A), (C) and (D) only
   • C(A) only
   • D(A) and (C) only

   Show answer & solution

   Correct answer: (A)

   (A) It is not an example of female heterogamety. It is an example of male heterogamety because males have two different types of gametes (XO and OO), while females have only one type (XX).
   
   (B) This statement is correct. Males produce two different types of gametes, either with (X) or without (O) an X chromosome.
   
   (C) This statement is incorrect because the total number of chromosomes is not the same in both males and females. Females have XX, and males have XO.
   
   (D) This statement is correct. All eggs bear an additional X chromosome besides the autosomes.
3. NEET 2018EasyVegetative Propagation
   Q3

   Offsets are produced by [2018]

   • AMeiotic divisions
   • BMitotic divisions
   • CParthenogenesis
   • DParthenocarpy

   Show answer & solution

   Correct answer: (B)

   Offset is a vegetative part of a plant, formed by mitosis.
   
   – Meiotic divisions do not occur in somatic cells.
   
   – Parthenogenesis is the formation of embryo from ovum or egg without fertilisation.
   
   – Parthenocarpy is the fruit formed without fertilisation, (generally seedless)

Topic-wise question count

Where NEET has asked from Reproduction in Organisms, most frequent first.

• Vegetative Propagation9
• Sexual Reproduction8
• Events in Sexual Reproduction7
• Asexual Reproduction6
• Life Span3

Year-wise Reproduction in Organisms questions in NEET

Number of questions from this chapter in each year's paper(s).