Navegando por Autor "Falcão Filho, Paulo de Arruda"

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Modelo binominal para uma descrição e análise dos caracteres quantitativos
(1980) Falcão Filho, Paulo de Arruda; Falcão, Tânia Maria Muniz de Arruda
Observação de complementação genética na descendência de indivíduos mutantes para o caráter cor do olho em Drosophila melanogaster
(1979) Falcão, Tânia Maria Muniz de Arruda; Falcão Filho, Paulo de Arruda
A case of genetic complementafon was analysed by the utilization ot two different homozygotic recessive strains of Drosophila meianogaster, mutant for the eye color character. The studied mutations, namtd maroon-Uke^ and white-coffee, produce individuais respectively with rtd-violet and dark carmine eyes, so differentiating them from the wild type with dark rtd bright eyes. Heterozygotic individuais for the ir TRANS exhibited the wild phenotype, which offered an evidence of the ocurrem e of intercistronic genetic complementation.
Total de classes genotípicas, nas populações naturais, para n locos com quaisquer números de alelos
(1979) Falcão Filho, Paulo de Arruda; Falcão, Tânia Maria Muniz de Arruda
With the discovery of a great number of polyallelic loci in the natural populations, the total number of possible genotypic classes is actually very high. What mostly contributes to the raising of this total are the genotypic classes formed by the combination of loci in homozygosis with ones in heterozygosis. The totall> homozygotic genotypes or the totally heteri zygotic ones contribute in a minor degree. Gene linkage and epistatic interactions are, however, strong factors which somewhat reduce this high value. As a consequence, the natural populations must possess a genotypic variability which is potentially higher than the one actually exhibited.