Difference between revisions of "Recessive Allele"
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: When a [[genotype]] includes one [[Dominant Allele|dominant allele]] and one [[Recessive Allele|recessive allele]] the physical appearance of the person will be based on the [[Dominant Allele|dominant allele]]. | : When a [[genotype]] includes one [[Dominant Allele|dominant allele]] and one [[Recessive Allele|recessive allele]] the physical appearance of the person will be based on the [[Dominant Allele|dominant allele]]. | ||
: When there are two copies of the [[Recessive Allele|recessive allele]] the physical appearance of the person will be based on the '''recessive allele'''. | : When there are two copies of the [[Recessive Allele|recessive allele]] the physical appearance of the person will be based on the '''recessive allele'''. | ||
| − | : In a [[Punnett Square]] or [[Genetic Cross Diagram]] | + | : In a [[Punnett Square]] or [[Genetic Cross Diagram]] [[Dominant Allele|dominant alleles]] are written with a capital letter while the [[Recessive Allele|recessive alleles]] are written with a lower case letter. |
Revision as of 11:12, 19 November 2018
Key Stage 4
Meaning
A Recessive allele is an allele which can only be expressed in the phenotype when there are two copies of that allele.
About Dominant Alleles
- When a genotype includes one dominant allele and one recessive allele the physical appearance of the person will be based on the dominant allele.
- When there are two copies of the recessive allele the physical appearance of the person will be based on the recessive allele.
- In a Punnett Square or Genetic Cross Diagram dominant alleles are written with a capital letter while the recessive alleles are written with a lower case letter.