Punnett Square Blank

An interactive Punnett Square calculator to work out patterns of inheritance for any autosomal recessive genetic trait or disease.

Use this Punnett square as a tool to work out patterns of autosomal recessive inheritance. Drag and drop an icon from the top for the mother and the father, based on whether they are affected, unaffected, or carriers of a trait or disease. Customize the Punnett square by selecting a letter from the alphabet on the right. Tap MATE and see all possible gene combinations for offspring based on the parents’ genes. A recessive trait/disease results when offspring inherit two copies of a recessive gene (a) – one from each parent. In this case, 1 of 4 possible gene combinations is aa, so 25% of offspring will have the trait/disease. Aa offspring (50%) have one dominant and one recessive gene; they will not have the trait/disease but are “carriers” of the recessive gene. An AA offspring does not have the trait/disease. There is no possibility of passing on a recessive gene (a) to the next generation. An Aa offspring does not have the trait/disease, but is a “healthy carrier” with one copy of the recessive gene (a) that may be passed on to the next generation. An aa offspring has the trait/disease, and will pass the recessive gene (a) on to the next generation. Tap OFFSPRING again to see which of the four possible gene combinations may occur for another pregnancy.

Punnett, recessive, inheritance, gene, mutation, offspring, probability, disease, trait, autosomal, calculator, dominant, carrier, risk, Punett, Punnette, Punnet

  • ID: 17001
  • Source: DNALC

Related Content

16999. Genetic Traits

An interactive Punnett Square inheritance calculator to work out patterns of recessive inheritance for a trait.

  • ID: 16999
  • Source: DNALC

17000. Genetic Diseases

An interactive Punnett Square calculator to work out patterns of inheritance for a recessive genetic disease.

  • ID: 17000
  • Source: DNALC

16931. 2D Animation of Genes and Inheritance

An animation introduces DNA and the pattern of inheritance for SMA.

  • ID: 16931
  • Source: DNALC.SMA

16996. Genes and Inheritance

An animation introducing the basic concepts of genetics and recessive inheritance.

  • ID: 16996
  • Source: DNALC

16930. The Inheritance Pattern of SMA

Dr. Sumner describes how SMA is inherited.

  • ID: 16930
  • Source: DNALC.SMA

16192. : Genetic inheritance follows rules.

DNAFTB Animation 5:Reginald Punnett and William Bateson explain Mendel's ratios.

  • ID: 16192
  • Source: DNALC.DNAFTB

16205. Biography 5: Reginald Crundall Punnett (1875-1967)

Punnett devised the "Punnett Square" to depict the number and variety of genetic combinations, and had a role in shaping the Hardy-Weinberg law.

  • ID: 16205
  • Source: DNAFTB

16998. Genetic Screening

An animation about screening for recessive genetic diseases.

  • ID: 16998
  • Source: DNALC

16263. Chromosomes carry genes.

DNAFTB Animation 10:Thomas Hunt Morgan describes his discoveries using fruit flies.

  • ID: 16263
  • Source: DNALC.DNAFTB

16181. Some genes are dominant.

DNAFTB Concept 4: Mendel identifies dominant and recessive genes.

  • ID: 16181
  • Source: DNALC.DNAFTB