Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following statements refers to the process of 'parthenogenesis'? 1. It is a natural form of asexual reproduction in which the growth and development of embryos occur without fertilisation. 2. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. 3. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg inside of the female's body  Select the correct answer using the codes given below.

Which of the following statements refers to the process of 'parthenogenesis'? 1. It is a natural form of asexual reproduction in which the growth and development of embryos occur without fertilisation. 2. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. 3. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg inside of the female's body  Select the correct answer using the codes given below. Correct Answer Only 1

The correct answer is Only 1.

Key Points  

  • Parthenogenesis
    • Parthenogenesis is a reproductive strategy that involves the development of a female (rarely a male) gamete (sex cell) without fertilization.
      • ​Hence statement 1 is correct.
    • It occurs commonly among lower plants and invertebrate animals particularly rotifers, aphids, ants, wasps, and bees, and rarely among higher vertebrates.
    • A gamete is an egg in females and sperm in males.
    • In animals, parthenogenesis means the development of an embryo from an unfertilized egg cell.
      • Many species that reproduce through parthenogenesis do not reproduce sexually.
      • Parthenogenesis is one of the known means of asexual reproduction.
        • Grafting (of plants) is also a type of asexual reproduction.
        • Hence statements 2 and 3 are incorrect.

​Additional Information

  • Parthenogenetic offspring tend to be clones of the parent, as there has been no exchange and rearrangement of genetic information with another individual as happens in case of a sexual reproductive process.
  • Parthenogenesis is rare in higher vertebrates like snakes, but recently a green anaconda in the USA had given birth to a Parthenogenetic offspring.

Related Questions

Consider the following statements asexual reproduction in animals: 1. The technique of creating the genetically similar and multicellular organism from a single mature cell of the parent is known as cloning Parthenogenesis. 2. Cloning is a form of reproduction in which an egg can develop into an embryo without being fertilized by a sperm. Choose the correct option:
Which of the following statements is/are true in the context of fertilisation and pollination in plants. A. Ovary of the flower matures into fruit. B. Seeds of the plant forms the ovules for fertilisation. C. Pollination takes place after fertilisation. D. In pollination, seeds are dispersed by wind, water, birds and insects. E. Fertilisation takes places in the ovules.
Consider the following statements regarding double fertilization and choose the correct answer:
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo
Each question below is followed by two statements I and II. You have to determine whether the data given in the statements are sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose the best possible answer. What is the average weight of new students added? I. In a class 60% students are male and there average weight is 15 kg more than the female students, 9 males and 6 new female students joined the class and the average weight of the class increased by 0.84 II. Total male students in the class is 12 more than female students adding 9 male students to the class increases the average weight of male students by 1 kg and adding 6 female students increases the average weight of female students by 0.6.
Which of the following statements is/are correct? 1. In Intracytoplasmic sperm injection method ova from the wife/donor (female) and sperms from the husband/donor (male) are collected and are induced to form zygote under simulated conditions in the laboratory. 2. In vitro fertilisation is a specialised procedure to form an embryo in the laboratory in which a sperm is directly injected into the ovum.
Consider the following statements regarding poloyembryony and choose the correct answer:
1. False polyembryony includes the development of two or more embryo sacs within the Same nucellus, and the embryos are derived from different embryo sacs
2. In cleavage polyembryony, the zygote instead of giving rise to one embryo produces embryos by cleavage
3. According to Jeffrey (1895), in Erythronium americanum the "embryogenic mass" forms two or three embryos
Which among the following is correct regarding male-female inter and intra-state migration in India as per Census-2011 data? 1. In intra-state migration, male outnumbers female in rural to urban migration 2. In inter-state migration, male outnumbers female in rural to urban migration 3. In intra-state migration, female outnumbers male in rural to rural migration 4. In inter-state migration, male outnumbers female in rural to rural migration
Consider the following statements regarding sexual reproduction in plants: 1. Reproduction in plants takes place only through asexual methods. 2. Reproduction in spirogyra takes place through the process of fragmentation. 3. Vegetative propagation in plants can be achieved only by natural method. Which of the statements from above is/are correct?
Asexual reproduction differs from sexual reproduction in that in asexual reproduction, ________
Asexual reproduction differs from sexual reproduction in that in asexual reproduction, ______