Alleles Flashcards
1
Q
what are alleles?
A
Different versions of the same gene
2
Q
Name 2 examples of alleles
A
Eye colour - blue/green/brown
Hair colour - brown/blonde/black
3
Q
What’s the structure of homologous chromosomes?
A
- same length
- same centromere location
- can have different alles
4
Q
What’s the structure of sister chromatids?
A
- same alleles
- held together by centromere
5
Q
What’s the difference between sister chromatids and homologous chromosomes?
A
Sister chromatids are formed during DNA replication therefore are identical
Homologous chromosomes are paired up after fertilisation so one is from your mum and one from your dad
