Second Chromosome viability Genetic Load and Lethal Allelic Frequency in Drosophila melanogaster in Lagos

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dc.contributor.authorAdekoya, K.O.
dc.contributor.authorWilliams, G.O.
dc.date.accessioned2019-02-04T13:58:16Z
dc.date.available2019-02-04T13:58:16Z
dc.date.issued2001
dc.description.abstractThe frequencies of recessive lethal, semilethal, subvital and quasinormal chromosomes-2 in Drosophila melanogaster from 5 sites in Lagos and one near Lagos, were determined by making one chromosome-2 from each trapped male homozygous. The frequency of allelism, among the lethal chromosomes isolated, was also determined. Heterogeneity chi-square tests among the sites were inconclusive. The results were more suggestive of free gene flow among the sites , especially as the difference between the intrasite and intersite frequencies of allelism was not significant. The very low frequencies indicated a large population. The frequencies of lethal, semilethal, subvital, quasinormal and normal chromosomes in the population were 13.1%, 5.8%, 19.4%, 52.7% and 9.0% in that order. Although the frequency of lethals was lower than expected for a lowland population located close to equator, the proportion of lethals among drastics (lethal + semilethals) was not different from values for a number of populations in higher latitudes. Also, comparisons with previous data on chromosome -3 suggest that generalizations on genetic load in populations must be based on data of all the major chromosomes in the species.en_US
dc.identifier.citationAdekoya, K.O and Williams, G.O. (2001): Second Chromosome viability Genetic Load and Lethal Allelic Frequency in Drosophila melanogaster in Lagos Nigeria. J. of Sci, Tech. and Environ. 1 (1) : 77-84.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/3575
dc.language.isoenen_US
dc.publisherUniversity of Lagos, Nigeriaen_US
dc.subjectgenetic load, allelism, drastics, detrimentals, viabilityen_US
dc.titleSecond Chromosome viability Genetic Load and Lethal Allelic Frequency in Drosophila melanogaster in Lagosen_US
dc.typeArticleen_US
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