genes, chromosomes, cell division and variation Flashcards
1
Q
gene
A
length of dna which codes for a protein
2
Q
dna
A
double helix shape
made of 4 building blocks called bases
adenine, cytosine, guanine, thymine
AT
CG
3
Q
diploid
A
humans contain 2 copies of each of their 23 chromosomes
4
Q
haploid
A
only contain one copy of each chromosome