What is the difference between a gene and an allele?

  • 1 vote

For edexcel snab AS biology, Help asap exam tomorrow! 

Posted Wed 25th May, 2011 @ 11:21 by hannah

6 Answers

  • 2 votes

an allele is a gene which could have many variations of it e.g eye colour. the gene is the eye colour but the colour of the eye (blue, brown, green etc) is the allele

Answered Wed 25th May, 2011 @ 13:07 by Ni'keisha Brown-Kennedy
  • 1 vote

an allele is a different form of a gene

Answered Wed 25th May, 2011 @ 13:54 by Pui Pui
  • 1 vote

Alleles are differing forms of a gene that arise by mutation and are found at the same place on a chromosome. short and sweet.

Answered Wed 25th May, 2011 @ 18:16 by joe
  • 0 votes

A gene is a segment of DNA/sequence of bases that codes for a polypeptide chain. Every individual has two sets of chromosomes (i.e two chromosome #1s, two chromosome #2s, etc). Each chromosome in a pair has similar genes to the other. SIMILAR. Since one chromosome came from your mother, and the other came from your father the corresponding genes on those chromosomes are NOT identical (, due to Chaismata formation/Mutation/Random assortment/Natural selection).

Therefore it is termed that an allele is the alternate version of a gene.

For example, theoretically speaking:

Maternal Chromosome 1 has base sequence for Polypeptide A = CCCGGG

Paternal Chromosome 1 has base sequence for Polypeptide B = CCCGGC

The last base sequence differs by only ONE base. Therefore the genes are similar. Hence they are alleles.

=)

Answered Sun 29th May, 2011 @ 17:02 by Chris
Edited by Chris on Sun 29th May, 2011 @ 20:54
  • 0 votes

a cell contains a nucleus. The nucleus contains long strands called chromosomes. Chromosomes come in pairs and each pair has genes in different sections. Each chromosome of a pair has a different version of a gene, or alleles.

Answered Thu 15th November, 2012 @ 20:05 by Former Member
  • -2 votes

An allele is a section of a gene that codes for a specific characteristic e.g. blood type. 

Answered Wed 25th May, 2011 @ 12:14 by Former Member