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(P) Genetics (Human Characteristics (Common (One nose, Two eyes,…
(P) Genetics
Human Characteristics
Common
One nose
Two eyes
Fingernails
One heart
Variations
Height
Eye colour
Accent
Interest in sport
Developed
Inherited
Develop during life
Inherited Characteristics
Passed on from parents
Example
Height
Eye colour
Length of eyelashes
Shape of face
Controlled by gens
Chromosome Numbers
Each cell has 46 chromosome(expert sperm and egg cells)
Sperm and eggs cells only have half 23
When united they have 46
Half from the mother
Half from the father
Chromosomes consist of two sets of 23
Non-inherited Characteristics
Not passed on by parents
Examples
The ability to speak one or more languages
An interest in sport
Writing
Reading
Riding a bike
Using a computer
Genes
Short sections of DNA located on chromosomes
Examples
One makes acid in our stomach
Another makes the coloured chemical in our eyes
Chromosomes
Thread-like structures made of DNA and protein in the nucleus of cells
The study of how traits or characteristics are inherited