Biology is one of the important branches of science that helps the learners to know about various living bodies and their internal systems. The human as well as animals reproductive system is also an important part of this subject. The first chapter in 12th class Biology deals with the concept of reproduction in different organisms. This concept is very crucial as you will get to understand the fundamental principles of reproduction involved in different species. You have to understand that it is by this method that different species are able to continue their existence for all these years. This process is inevitable for all the organisms in this world, and there are majorly two types of reproduction system followed by different organisms. While some organisms choose the sexual reproduction method, some others follow the asexual reproduction method. This concept is explained in a detailed manner in this chapter, and you can rest assured that having a proper understanding of these concepts will help you to get good grades in the exam.
Basic format of this chapter
To begin with, the asexual reproduction concept is explained in a detailed manner, and this involves the splitting up of different cells to create a copy of the same organism. You can find this in single-celled organisms that split up to form multiple organisms. In the same way, it can also be noticed in multiple cellular organisms wherein they split into a different set of organisms. This forms the basic concept of the chapter, and you should pay a lot of attention to the important concepts of this chapter.
The CBSE class 12 Biology chapter 1 also deals with the concept of sexual reproduction, and this is explained in a detailed manner. In this method, two different organisms of the same species come together to give life to a new organism. In this procedure, the new organism will adopt all the properties of the parent genes. It has to go through the different process to accomplish the task, and everything begins with the coming together of two organisms. This leads to fertilization and gives life to the new organism.
The class XII Biology chapter 1 deals with the concept of sexual reproduction in different steps and you can get complete information about the pre-fertilization events that lead to the formation of the new organism. The next step in this process is the gamete transfer which actually leads to fertilization in the female species. Once this process is completed, the embryo will be formed, and it gives life to the new organism. The duration taken for this process depends upon the species, and it can vary from a couple of days too many months depending upon the species.
Understanding this concept is very important for further learning, and you will notice that the upcoming chapters will include the detailed reproduction process of different plants and animal. In this regard, getting complete information about this chapter is very crucial to understand the concepts in reproduction.