Inheritance DNA & Evolution - DNA & Inheritance Flashcards
what is DNA classed as and what structure does it have
polymer
double helix structure
what is DNA made up of
chromosomes
what are genes
small section of DNA found on a chromosome
what does a gene do
codes for a particular sequence of amino acid which are put together to make a specific protein
how many amino acids are used
20 but they make thousands of different proteins
what determines what type of cell something is
dna determines what protein the cell produces that in turn determines what cell it is
what is a genome
entire set of genetic material in an organism
what is understanding the human genome important for
identifying genes that are linked to diseases
so can develop effective treatment for them
can trace migration of populations of people around the world. Scientist study differences in genome to work out when new pops slit off
DNA is made of repeating units called what
nucleotides
what do nucleotides consist of
one sugar molecule and one phosphate molecule and one of 4 bases
the sugar and phosphate molecules alternate and the base sticks out
what are the 4 bases of DNA
A C G T
what decides the order of amino acids in a protein
order of the base in a gene
each amino acid is coded by what
sequence of three bases
how is DNA kept in a helix structure
each base is linked to a base on the opposite side of the structure.
A pairs with T
C pairs with G
this is called complementary base pairing
what do non coding parts of DNA do
switch genes on and off. so control if gene is expressed (used to make a protein)