GENETICS AND EVOLUTION Flashcards
1
Q
What is a chromosome?
A
A strand like structure found in the nucleus. It contains genetic information (DNA).
2
Q
What is DNA?
A
A chemical substance found in the chromosome. It is a double helix, and the helix’s are joined together with bases.
3
Q
What is a gene?
A
A short section of DNA. It has a particular base structure which determines particular characteristics.
4
Q
What are the letters that the bases are held together with?
A
A, T, C and G
5
Q
How many chromosomes are in a normal body cell?
A
46 chromosomes
23 pairs
6
Q
The sex chromosome is what pair?
A
23rd.
