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Created page with "==Key Stage 4== ===Meaning=== Alleles are different forms of the same gene. ===About Alleles=== : A single gene, such as the gene for eye colour, may have sev..."
==Key Stage 4==
===Meaning===
[[Allele]]s are different forms of the same [[gene]].
===About Alleles===
: A single [[gene]], such as the [[gene]] for eye colour, may have several [[allele]]s such as blue eyes, brown eyes, green eyes...etc.
: [[Allele]]s can be [[Dominant Allele|dominant]] or [[Recessive Allele|recessive]].
: [[Dominant Allele|Dominant alleles]] are expressed in the [[phenotype]] when there is only one copy of the [[allele]]. Whereas [[Recessive Allele|recessive alleles]] are only expressed in the [[phenotype]] when there are two copies.
===Meaning===
[[Allele]]s are different forms of the same [[gene]].
===About Alleles===
: A single [[gene]], such as the [[gene]] for eye colour, may have several [[allele]]s such as blue eyes, brown eyes, green eyes...etc.
: [[Allele]]s can be [[Dominant Allele|dominant]] or [[Recessive Allele|recessive]].
: [[Dominant Allele|Dominant alleles]] are expressed in the [[phenotype]] when there is only one copy of the [[allele]]. Whereas [[Recessive Allele|recessive alleles]] are only expressed in the [[phenotype]] when there are two copies.