KA6- Evolutionary importance Flashcards
1
Q
What is mutation the only source of?
A
New variation
2
Q
What happens if there was no mutation?
A
All organisms would be genetically identical and there would be no variation between them, no natural selection and no evolution
3
Q
What do single gene mutations change?
A
The DNA base sequence and some may create new alleles
4
Q
What are alleles?
A
Different versions of genes
5
Q
What do these new alleles code for?
A
New proteins
6
Q
What could these new proteins do?
A
Give an organism a survival advantage over others and
7
Q
Why is duplication important?
A
As it produces 2nd copies free from selection pressures
8
Q
What can this second copy be used for?
A
They can be altered without affecting the functioning of the organism, because the original copy continues to produce the correct protein
