# Punnett Square

(Difference between revisions)
 Revision as of 05:20, 21 November 2015 (view source)Nnjm2 (Talk | contribs) (Instructions on how to correctly reference not followed. Fixed problem.)← Older edit Latest revision as of 22:21, 5 December 2017 (view source) (Added links to other wiki pages) Line 5: Line 5: A table used to predict the [[Phenotype|phenotype]] of the offspring of two known parent organisms. The punnett square can also be used to carry out a back cross. This is a technique where the phenotype of the offspring is used to determine the [[Genotype|genotype]] of one or both of the parental organisms. A table used to predict the [[Phenotype|phenotype]] of the offspring of two known parent organisms. The punnett square can also be used to carry out a back cross. This is a technique where the phenotype of the offspring is used to determine the [[Genotype|genotype]] of one or both of the parental organisms. − A punnett square can be used in order to assess the probability of offspring inheriting a particular trait from its parents. In general, a capital letter (e.g. A) indicates a dominant allele, whilst a lower case letter (e.g. a) indicates a recessive allele. The assumption is made that the likelihood of inheritance of each allele from each parent will be 0.5. For example, for a parent of genotype Aa, P(A)=0.5 and P(a)=0.5. If a parent is homozygous (AA or aa), the probability of inheriting the allele will be 1http://anthro.palomar.edu/mendel/mendel_2.htm last accessed: 19/11/2015.
+ A punnett square can be used in order to assess the probability of offspring inheriting a particular trait from its parents. In general, a capital letter (e.g. A) indicates a [[Dominant_allele|dominant allele]], whilst a lower case letter (e.g. a) indicates a [[Recessive_allele|recessive allele]]. The assumption is made that the likelihood of [[Inheritance|inheritance]] of each allele from each parent will be 0.5. For example, for a parent of genotype Aa, P(A)=0.5 and P(a)=0.5. If a parent is homozygous (AA or aa), the probability of inheriting the allele will be 1http://anthro.palomar.edu/mendel/mendel_2.htm last accessed: 19/11/2015.
− === References === + === References ===

## Latest revision as of 22:21, 5 December 2017

A Punnett Square.

Invented by Professor Reginald Crundall Punnett FRS (20 June 1875 - 3 January 1967)

A table used to predict the phenotype of the offspring of two known parent organisms. The punnett square can also be used to carry out a back cross. This is a technique where the phenotype of the offspring is used to determine the genotype of one or both of the parental organisms.

A punnett square can be used in order to assess the probability of offspring inheriting a particular trait from its parents. In general, a capital letter (e.g. A) indicates a dominant allele, whilst a lower case letter (e.g. a) indicates a recessive allele. The assumption is made that the likelihood of inheritance of each allele from each parent will be 0.5. For example, for a parent of genotype Aa, P(A)=0.5 and P(a)=0.5. If a parent is homozygous (AA or aa), the probability of inheriting the allele will be 1[1].

### References

1. http://anthro.palomar.edu/mendel/mendel_2.htm last accessed: 19/11/2015