Mendelian ratio


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Mendelian ratio

[men′dēl·yən ′rā·shō]
(genetics)
The ratio of occurrence of various phenotypes in F1 and F2 generations in any cross involving characters controlled by nuclear genes.
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b) Indicates nominal significant deviation from expected Mendelian ratio (P < 0.
The Mendelian ratio was observed in all size classes of males and females (Figure 1), except the 7th (from 26 to 30 mm), in which females predominated (p=0.
In addition, chi-square analysis revealed that 350 of those markers (179 in female and 171 in male) segregated with a 1:1 ratio, and 54 (30 in female and 24 in male) deviated significantly from the Mendelian ratio at P < 0.
To determine whether a single male was unlikely to account for the genetic diversity of a female's brood, we used a significant deviation from a Mendelian ratio among progeny genotypes as our criterion.
107 ([dagger]) In accordance with the expected Mendelian ratio of 3:1 at P = 0.
All segregating loci scored were checked with the chi-square test for goodness of fit to the 1:1 Mendelian ratio.
The progeny of such plants are expected to show the typical 3:1 Mendelian ratio of tolerant to sensitive plants for one gene, and 15:1 for two genes in the case of imidazolinone.
5 per paternal B from the mean number of B chromosomes in the progeny (since the B was transmitted in a Mendelian ratio through males) and dividing by the number of B chromosomes carried by the female parent.
In addition, the chi-square analysis revealed that 350 (179 in female and 171 in male) segregated with a 1:1 ratio and 54 (30 in female and 24 in male) deviated significantly from the Mendelian ratio at P < 0.
Chi-square ([chi square]) analyses, using the correction factor of Yates (Steel and Torrie, 1980), were performed to determine if the observed segregation ratio was consistent with a Mendelian ratio.
The remaining four families do not fit any of the tested ratios and contain a large number of progeny in the RL negative/2-5A negative category, which would not be characteristic of any simple Mendelian ratio.
In crosses with at least two parents, a deviation from the expected Mendelian ratio was observed, associated with deficiency of tolerant segregates.