Causes Of Variation Flashcards
1
Q
What is variation a result of?
A
- Genetic differences
- Environmental influences
2
Q
How does gene mutation cause variation?
A
Changes to genes and chromosomes that produce new alleles
3
Q
How does meiosis cause variation?
A
- independent segregation of homologous chromosomes and cross over of genes between chromosomes results in new combinations of alleles
4
Q
How does random fertilisation cause variation?
A
gametes are genetically unique and fertilisation is a random event so offspring are different to both their parents.
5
Q
How do environmental factors cause variation?
A
Exert influence on gene expressions in all organisms
