Genes and Gene Variation Flashcards
1
Q
Chromosone
A
Thread like structures made of DNA
2
Q
DNA
A
Material that genes are made of
3
Q
Evolution
A
Process by which organisms have developed from earlier forms of life on Earth
4
Q
Extinction
A
The complete disappearance of a species from Earth
5
Q
Fossil
A
The remains or impression of a prehistoric plant or animal embedded in rock and preserved in petrified form.
6
Q
Gene
A
Section of DNA that codes for a particular characteristic
7
Q
Natural selection
A
Process where organisms better adapted to their environment survive to breed and pass on their genes.
8
Q
Recessive
A
Characteristic only expressed in the homozygous condition
9
Q
Invertebrate
A
Animal without a backbone
10
Q
Vertebrate
A
Animal with a backbone
