NCERT Solutions For Class 12 Biology Chapter 1: Reproduction In Organisms

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NCERT Solutions for Class 12 Biology Chapter 1 Reproduction In Organisms is provided in this article. This chapter is under Unit VI- Reproduction, which is excluded from CBSE Class 12 Syllabus. The important topics that are covered in Class 12 Biology Chapter 1 are:

Download PDF: NCERT Solutions for Class 12 Biology Chapter 1 Reproduction in Organisms

NCERT Solutions for Class 12 Biology Chapter 1

NCERT Solutions PDF for Class 12 Biology Chapter 1 Reproduction in Organisms is provided below.

Class 12 Biology Chapter 1 Reproduction in Organisms: Important Topics

Reproduction in organisms is a biological process that helps animals to breed and continue the growth of the species. There are different ways of reproducing which can be either sexual or asexual. The article helps the students to understand both sexual and asexual reproduction, their processes, male and female reproductive organs systems, and disorders related. The important topics related to the chapter are as follows:

Reproduction

Reproduction is the production of offspring. There are different ways of reproduction in both sexual and asexual forms based on preference.

Sexual Reproduction: In this process, an organism combines the genetic information from each of its parents and is genetically unique. It occurs when the sperm from the male parent fertilizes an egg from the female parent, producing offspring.
Asexual Reproduction: On the contrary, one parent copies itself to form a genetically identical offspring in asexual reproduction. The offspring that inherits the full set of genes of their single parent arises by asexual reproduction from either unicellular or multicellular organisms.

Binary Fission

Binary fission is the asexual reproduction that takes place by a separation of the body into two new bodies. In this process, an organism duplicates its genetic material, or deoxyribonucleic acid (DNA), and then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.

Gemmule Formation

Gemmule formation generally takes place in freshwater by several sponges like Spongilia and some water species such as sea sponges, figuline ficus, and various other types of poriferans.

Vegetative Propagation in Plants

Vegetative propagation is an asexual process of plant reproduction that occurs in its leaves, roots and stem. The process can take place through fragmentation and regeneration of specific vegetative parts of plants.

Vegetative propagation in plants

Vegetative propagation in plants

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CBSE CLASS XII Related Questions

1.
Which of the following statements about plasmids is incorrect?
- Plasmids have the ability to replicate within the bacterial cell.
- Their replication is controlled by chromosomal DNA.
- They are autonomously replicating circular extra-chromosomal DNA.
- They often carry antibiotic resistant genes.
View Solution
2.
The idea of use and disuse of organs for evolution of organism was proposed by
- Charles Darwin
- Thomas Malthus
- Hugo De Vries
- Lamarck
View Solution
3.
Assertion (A) : The population of melanized moths increased in areas after Industrial Revolution.
Reason (R) : In Industrial environment lichen covered trees were replaced by soot-covered trees offering better camouflage to dark coloured moths.
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
View Solution
4.
Assertion (A): Repetitive sequences make up a very large portion of human genome.
Reason (R): Repetitive sequences do not have direct coding functions in the genome.
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
View Solution
5.
In the following figure, two ways of pairing of two homologous pairs of chromosomes are shown. Which of the following phenomena is expressed?
- Linkage of genes
- Independent assortment of genes
- Multiple alleles
- Incomplete dominance
View Solution
6.
Which connective tissue connects ovary to pelvic wall and uterus?
- Tendons
- Ligaments
- Cartilage
- Bone
View Solution