3.1 genes and 3.2 chromosomes Flashcards
1
Q
difference between gene and allele
A
gene:
- a heritable factor that consists of a length of DNA and influences a specific characteristic
- a gene is a sequence of DNA that encodes for a specific trait (traits may also be influenced by multiple genes)
- a gene occupies a specific position on a chromosome(locus-singular, loci-plural)
alleles:
- alleles are alternative forms of a gene that code fro the different variations of a specific gene
- alleles posses very similar gene sequences and only differ from each other by one or a few bases
2
Q
how are new alleles formed?
A
new alleles are formed by mutation.
