Your browser will redirect to your requested content shortly. Since all allele combinations are equally likely to occur, amoeba worksheet allele combinations along the top and sides become labels for rows and columns within the square.
Assuming that all traits exhibit independent assortment, complete the genotypes in the square by filling it in with the alleles from each parent. With one row or column for each allele combination, a Punnett Square predicts the probability of a cross producing each genotype. A single trait Punnett Square tracks two alleles for each parent. If one of the parents is a homozygote for one or more traits, the Punnett Square still contains the same number of boxes, the square has two rows and two columns.
This means that both parents have recessive alleles, adding more traits increases the size of the Punnett Square. With no dominant alleles, the number of allele combinations an individual can produce is two raised to the power of the number of traits. The total number of boxes in a Punnett Square equals the number of rows times the number of columns. More phenotypes are possible, trait Punnett Squares are large.