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The chance of a particular trait being inherited. For each trait there are several alleles, some are dominant and others recessive, for example brown eyes are dominant over blue.

The recessive phenotype can only have a genotype with both recessive alleles eg. bb

The dominant phenotype can have a genotype with both dominant alleles eg. BB or one of each eg. Bb

A punnet square shows the likelihood of a phenotype being inherited from given genotypes, alleles etc...

BB and Bb makes BB BB Bb Bb

All offspring will have the dominant phenotype (BB or Bb) eg. brown eyes

Bb and Bb makes BB Bb Bb bb

One in four of the offspring will have the recessive phenotype (bb) eg. blue eyes

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13y ago

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