BIO101 ‒ Topic 21: Reproduction in Living Organisms
Course Code: BIO 101
Course Name: General Biology
© Lesuyai Organic Guides 2025
(Original ¦ Educational ¦ Professional ¦ Plagiarism-Free ¦ A4 Format)
21.1 Introduction
Reproduction is a fundamental biological process by which living organisms produce new individuals of their own
kind. It ensures the continuity of life, transfer of genetic information, and preservation of species across
generations. Although growth and development maintain the individual, reproduction maintains the species.
21.2 Definition of Reproduction
Reproduction: The biological process through which new individuals (offspring) are produced from parent
organisms, ensuring species continuity.
21.3 Types of Reproduction
1. Asexual Reproduction:
• Involves a single parent.
• Offspring are genetically identical (clones).
• No fusion of gametes occurs.
• Common in lower organisms such as bacteria, fungi, and some plants.
2. Sexual Reproduction:
• Involves two parents (male and female).
• Involves fusion of gametes (fertilization).
• Offspring show genetic variation.
• Common in higher plants and animals.
21.4 Asexual Reproduction
Common Methods of Asexual Reproduction:
• Binary fission ‒ one cell divides into two (e.g., Amoeba, bacteria).
• Budding ‒ outgrowth develops into a new organism (e.g., Hydra, yeast).
• Fragmentation ‒ body breaks into parts that regenerate (e.g., flatworms).
• Spore formation ‒ spores develop into new individuals (e.g., fungi).
• Vegetative propagation ‒ new plants from parts such as stems, roots, or leaves (e.g., potato tubers, sweet potato).
Advantages:
‒ Fast and energy-efficient.
‒ Does not require a mate.
‒ Maintains successful traits.
Disadvantages:
‒ No genetic variation.
‒ Poor adaptability to environmental changes.
21.5 Sexual Reproduction
Course Code: BIO 101
Course Name: General Biology
© Lesuyai Organic Guides 2025
(Original ¦ Educational ¦ Professional ¦ Plagiarism-Free ¦ A4 Format)
21.1 Introduction
Reproduction is a fundamental biological process by which living organisms produce new individuals of their own
kind. It ensures the continuity of life, transfer of genetic information, and preservation of species across
generations. Although growth and development maintain the individual, reproduction maintains the species.
21.2 Definition of Reproduction
Reproduction: The biological process through which new individuals (offspring) are produced from parent
organisms, ensuring species continuity.
21.3 Types of Reproduction
1. Asexual Reproduction:
• Involves a single parent.
• Offspring are genetically identical (clones).
• No fusion of gametes occurs.
• Common in lower organisms such as bacteria, fungi, and some plants.
2. Sexual Reproduction:
• Involves two parents (male and female).
• Involves fusion of gametes (fertilization).
• Offspring show genetic variation.
• Common in higher plants and animals.
21.4 Asexual Reproduction
Common Methods of Asexual Reproduction:
• Binary fission ‒ one cell divides into two (e.g., Amoeba, bacteria).
• Budding ‒ outgrowth develops into a new organism (e.g., Hydra, yeast).
• Fragmentation ‒ body breaks into parts that regenerate (e.g., flatworms).
• Spore formation ‒ spores develop into new individuals (e.g., fungi).
• Vegetative propagation ‒ new plants from parts such as stems, roots, or leaves (e.g., potato tubers, sweet potato).
Advantages:
‒ Fast and energy-efficient.
‒ Does not require a mate.
‒ Maintains successful traits.
Disadvantages:
‒ No genetic variation.
‒ Poor adaptability to environmental changes.
21.5 Sexual Reproduction
