variation, genetics and inheritance

Question 1

list the 3 sources of variation

Answer 1

genetics - characteristics inherited by our parents

environment - characteristics that can be altered + changed by lifestyle choices

genetics + environment - e.g. inherits height genes but doesn’t fulfil potential because of poor quality diet

Question 2

list the 2 types of variation

Answer 2

continuous - shows a range of many intermediates between two extremes

discontinuous - no intermediates between them

Question 3

what is DNA made up of?

Answer 3

2 strands which spiral around called a double helix

Question 4

what is a gene?

Answer 4

small section of DNA on a chromosome

Question 5

what does each gene code for?

Answer 5

specific sequence of amino acids to make a specific protein

Question 6

what does a nucleotide consist of?

Answer 6

sugar
phosphate
base

Question 7

what are alleles?

Answer 7

alternative forms of a gene that code for the different variations of a specific trait

Question 8

carrier molecules function

Answer 8

bring specific amino acids to add to the growing protein chain in the correct order as cited for by the base sequence