trihybrid


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tri·hy·brid

(trī-hī'brid),
The offspring of parents that differ in three mendelian characters.
[tri- + L. hybrida, hybrid]

trihybrid

(trī-hī′brĭd)
n.
The hybrid of parents that differ at only three gene loci, for which each parent is homozygous.

trihybrid

(trī-hī′brĭd) [Gr. treis, three, + L. hybrida, mongrel]
In genetics, the offspring of a cross between two individuals differing in three unit characters.
References in periodicals archive ?
A review of these data finds that there are three times more Hispanic-labeled individuals of Mexican birth, or ascribed Mexican identity, than there are Hispanic-labeled individuals originating from all other Latin American countries, including those areas where an alternative trihybrid model would more accurately represent the ancestral diversity of the admixed populations, that is, from places in the Caribbean, like Cuba or Puerto Rico (Bryc et al.
As complicated as this dihybrid cross was, imagine such a cross with characters displaying incomplete dominance or a trihybrid cross (three nonlinked traits).
Moreover, as a result of the acceptance of interracial unions, Brazilians form one of the most heterogeneous populations in the world, constituting a trihybrid population with European, African, and Amerindian (i.e., South American Indian) roots.
For the heterozygous trihybrid RfrfMmNn in coupling phase, eight types of female gametes will be produced, including RfMN and rflmn [parental types, each with frequency of 1/2(1 - [r.sub.1] - [r.sub.2] + [r.sub.1][r.sub.2]), assuming no interference], RfMn and rfmN [single crossover between M and N, each with frequency of 1/2([r.sub.2] - [r.sub.1][r.sub.2])], Rfmn and rfMN [single crossover between Rf and M, each with frequency of l/2([r.sub.1] - [r.sub.1][r.sub.2])], and RfmN and rfMn (double crossover, each with frequency of 1/2 r.sub.1][r.sub.2]).
Secondly, the two versions of each exercise allow for detecting different non-disjunction events in the F1 progeny of the cross that generates the dihybrid or trihybrid females for test-crossing.
trihybrid cross: Cross between individuals of the same type that are heterozygous for three pairs of alleles at three different loci.
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., 1993) by backcrossing P.
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 crosses.
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.