Biology of Heredity (Genetics1)

Overview

Identify dominant/recessive characteristics. Infer that dominant characters mask the contribution of the recessive characters for the first generation (Fl). Recognise that the dominant characters become manifest in more individual members of a population than the recessive characters. Identify chromosomes in diagrams of cells. Note that chromosomes carry genes which are responsible for inherited characters: (a) Explain the advantages and disadvantages of: - Cross-fertilization and self-fertilization. - Sexual reproduction and asexual reproduction. - In and out-breeding. (b) Relate the application of the above to practices in agriculture and medicine.

Lesson details

Class: SS3
Subject: Biology
Theme: Continuity Of Life
Duration: 30:12

What you'll learn

Transmission and expression of characters in organisms:
(i) Hereditary variations
(ii) Characters that can be transmitted and how they are transmitted
(iii) How characters manifest from generation to generation.
Chromosomes, the basis of hereditary
(i) Location
(ii) Structure
(iii) Role in and processes of transmission of hereditary characters from parents to offspring.
Probability in genetics.
Application of the principles of heredity:
(i) In agriculture:
- Improved varieties.
- Diseases resistant. Varieties.
(ii) In medicine advice for couples in relation to the sickle cell gene.
Explain the terms:
- Cross-fertilization
- Self-fertilization.
- Out and in-breeding using Mendelian crosses.

Biology of Heredity (Genetics1)

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