The website has the complete lesson note for all the subjects in secondary school but this piece showcases the JSS3 Basic Science Lesson Note on Family Traits (Genetics). You can use the website search button to filter out the subject of interest to you.
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TOPIC: FAMILY TRAITS (GENETICS)
CONTENT: 1. Family Traits (Skin Colour, Height, Albinism, etc.)
- Meaning of Dominant and Recessive Traits
- Importance of Family Traits – Intelligence, Disease, Resemblance, Family Genealogy
Sub-Topic I: FAMILY TRAITS (SKIN COLOUR, HEIGHT, ALBINISM, ETC.)
Definition: Genetics is the scientific study of heredity and variation in living things. The transfer of materials which lead to heredity and variation occurs during reproduction in living things.
Heredity is a branch of genetics which studies how children or offspring take after their parents.
FAMILY TRAITS can be defined as transmittable characteristics which are passed from parents to offspring or children or progeny from one generation to another through reproduction. You may have your hair color as your mother or your eye color as your father.
We all have inherited traits that we share in common with others. Families share many traits in common because parents pass down inherited traits to their children. Yet, every person has a combination of traits that is unique to them. However, the modern science of genetics which seeks to understand the process of inheritance only began with the work of Gregor Mendel in the mid-19th century. Although he did not know the physical basis for heredity, Mendel observed that organisms inherit traits via discrete units of inheritance which are now genes. Gregor Mendel is the father of Genetics because his work on genetics formed the foundation for the quantitative and scientific study of genetics.
EXAMPLES OF FAMILY TRAITS
- Colour of skin ( Complexion )
- Height ( Tallness or Shortness )
- Colour of eyes
- Colour of hair
- Intelligence
- Shape of nose
- Blood group
- Albinism
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