Genetics Probability (Mendelian)
Find the probability of offspring showing a number of dominant traits across independent genes for Aa × Aa or test crosses, free online.
About this calculator
For independent genes, each offspring shows the dominant phenotype with probability 3/4 in an Aa × Aa cross and 1/2 in a test cross (Aa × aa). The number of dominant traits among n genes then follows a binomial distribution.