Post by Admin on Nov 21, 2016 12:02:04 GMT
Inheritable Characteristics
• These are passed from parent to child.
• Examples: eye colour, facial shape, blood group.
Non-Inheritable Characteristics
• These are acquired during life and are not controlled by genes.
• Examples: scars, accent, muscle strength.
Chromosomes
• These are strips of DNA wrapped around a protein.
• Every human cell contains 23 pairs of chromosomes except for the egg and sperm cells which contain 23 single chromosomes.
• Genes are sections of chromosomes which determine the chemical make up of the body.
• When a cell divides exact copies of its chromosomes are formed.
• At fertilisation the sperm cell and the egg cell combine to create 23 pairs of chromosomes.
• These are passed from parent to child.
• Examples: eye colour, facial shape, blood group.
Non-Inheritable Characteristics
• These are acquired during life and are not controlled by genes.
• Examples: scars, accent, muscle strength.
Chromosomes
• These are strips of DNA wrapped around a protein.
• Every human cell contains 23 pairs of chromosomes except for the egg and sperm cells which contain 23 single chromosomes.
• Genes are sections of chromosomes which determine the chemical make up of the body.
• When a cell divides exact copies of its chromosomes are formed.
• At fertilisation the sperm cell and the egg cell combine to create 23 pairs of chromosomes.