genotype frequency


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genotype frequency

the proportion of a particular genotype amongst all the individuals in a population. Thus, if a population sample contained 5 albinos and 95 normally-pigmented individuals, the genotype frequency of albinos (a/a) would be 0.05 or 5%. Note, however, that it is not possible to be certain of the frequency of A/a and A/A genotypes among the normal individuals, since both genotypes have the same PHENOTYPE due to dominance, although their frequencies can be predicted using the HARDY-WEINBERG LAW.
References in periodicals archive ?
In flock A, homozygous mutant genotype (GG) was observed 3 times giving a genotype frequency of 15%, mutation heterozygous genotype (GA) 14 times giving a genotype frequency of 70%, and wild genotype (AA) 3 times giving a genotype frequency of 15%.
A statistically significant age-associated decrease in the MTHFR 677T allele or 677TT genotype frequency was not observed.
The result of artificial hydatidosis corresponded with that of genotype frequency, indicating that the genic haplotype MvaIbc-SacIIab-Hin1Iab was resistant to hydatidosis.
Gene and genotype frequency of various breeds of buffalo Genotype frequency Genotypes Murrah Mehsana Surti Bhadawari Pooled AA 0.03 0.04 0.27 -- 0.09 AB 0.22 0.14 0.25 0.12 0.18 BC 0.35 0.30 0.22 0.68 0.39 AC 0.40 0.52 0.26 0.20 0.34 Alleles Allelic frequency A 0.34 0.37 0.53 0.11 0.34 B 0.28 0.22 0.23 0.40 0.28 C 0.38 0.41 0.24 0.49 0.38 Table 3.
Allele frequency and genotype frequency of PECI in different pig breeds Genotype frequency Breed CC CT TT Duroc 0.1111(2/18) 0.2778(5/18) 0.6111(11/18) Qingping 0.3750(12/32) 0.4375(14/32) 0.1875(6/32) Dahuabai 0.0556(1/18) 0.3889(7/18) 0.5556(10/18) Erhualian 0.1765(3/17) 0.2941(5/17) 0.5294(9/17) Yushan Black 0.7308(19/26) 0.2692(7/26) 0 Meishan 0.4667(7/15) 0.2667(4/15) 0.2667(4/15) Allele frequency Breed C T Duroc 0.2500 0.7500 Qingping 0.5938 0.4062 Dahuabai 0.2500 0.7500 Erhualian 0.3235 0.6765 Yushan Black 0.8654 0.1346 Meishan 0.6000 0.4000 Table 3.
It is mentioned here that the favorable GG genotype frequency was only 13% in the Angus population (Zhang et al., 2008) whereas the estimated frequency for this genotype was 73% in the Hanwoo population.
The [x.sup.2] tests of genotype frequency were used to determine whether individual variants were in equilibrium at each locus in the population (Hardy-Weinberg equilibrium).
The genotype frequency was 35.8, 37.5 and 26.7% for GG, GC and CC, respectively.
Allele and genotype frequencies at the PON1/EcoR locus obtained in the three breeds Allele frequency Breed Number A G Angus 30 0.5167 (a) 0.4833 (a) Hereford 30 0.5167 (a) 0.4833 (a) Simmental 28 0.5400 (a) 0.4600 (b) Total 88 0.5235 (a) 0.4765 (b) Genotype frequency Breed AA AG GG Angus 0.2627 0.5079 0.2294 Hereford 0.2627 0.5079 0.2294 Simmental 0.2865 0.5069 0.2065 Total 0.2726 0.5018 0.2255 [chi square] Breed PIC H test (p) Angus 0.3747 0.5000 0.9308 Hereford 0.3747 0.3667 0.1213 Simmental 0.3734 0.2800 0.0223 Total 0.3744 0.3882 0.0357 Frequencies with different superscripts differ (p<0.05).
From Table 2, the AA genotype frequency in European pig breeds was high, all were over 50%, and Duroc is the highest, its AA frequency was 10.00%.
Secondly, it should be noted that the extremely rare occurrence of the TT genotype frequency in this study limited the statistical analysis by gender, which is why more extensive studies with a larger sample size of with both genders are required.