As complicated as this dihybrid cross was, imagine such a cross with characters displaying incomplete dominance or a trihybrid
cross (three nonlinked traits).
Virgin females (designated by a Venus symbol combined with a "V") may be either dihybrid (A or B) or trihybrid (C or D).
Four possible exercises are presented: two dihybrid testcrosses (Figure 2A,B) and two trihybrid testcrosses (Figure 2 C,D).
Note that the dihybrid exercises are identical to their trihybrid counterparts except for the omission of the [y.
Evolution of a trihybrid
unisexual fish (Poeciliopsis: Poeciliidae).
Both loci were present on an alien chromosome, which had been introduced into a trihybrid
with pearl millet background (Dujardin and Hanna, 1989; Hanna et al.
Furthermore, in the Iblean region the clonal trihybrid parthenogen B.
The trihybrid genome constitution of Bacillus lynceorum (Insecta Phasmatodea) and its karyotypic variations.
Although I describe our specific class example in which we use this method with the F2 data from a dihybrid Drosophila cross, this method could easily be adjusted for analysis of a Drosophila trihybrid
cross as well, mapping each pair of genes individually (Brooker, 2005).
While Punnett squares are a useful device for determining the outcome of genetic crosses, they can become cumbersome for dihybrid or trihybrid
This process has delineated a Costa Rican population with a main trihybrid
ancestry, resulting from the cumulative admixture of genes of European (61%), Amerindian (30%) and African (9%) origin (Morera et al.
related to the unisexual molly fish, Poecilia formosa.