Genetics
The study of how traits or characteristics are inherited
Human characteristics
One nose
Two eyes
One heart
Fingernails
Variable human characteristics
Height
Eye colour
Accent
Interest in sport
Inherited characteristics
Height Eye colour Length of eyelashes Shape of face The ability to produce substances such as saliva, tears or enzymes
Non inherited characteristics
The ability to speak more than one language Writing Reading Riding a bike In interest in sport
Chromosomes
Are thread like structures ocated in the nucleus of the cell are made of DNA and protein
Genes
Short sections of DNA which control inherited characteristics located at the chromosome
Human cells
46 chromosomes 23 chromosomes in egg the 23 chromosomes in the sperm