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Molecular biology --- Chromosomes. --- Cytogenetics.

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Saccharomyces cerevisiae --- Saccharomyces cerevisiae --- Nucleotides --- Nucleotides --- chromosomes --- chromosomes --- genetic engineering --- genetic engineering

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Cattle --- Cattle --- Swine --- Swine --- Goats --- Goats --- cytogenetics --- cytogenetics --- breeding methods --- breeding methods --- chromosomes --- chromosomes --- genetic maps --- genetic maps --- Reproductive disorders --- Reproductive disorders

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Biologie moléculaire --- Molecular biology --- ADN --- DNA --- ARN --- RNA --- Génie génétique --- genetic engineering --- chromosomes --- Biochimie --- biochemistry --- Mutation --- mutation --- Expression des gènes --- gene expression --- Clonage --- cloning --- Biologie moléculaire --- DNA. --- RNA. --- mutation.

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The Genetical Theory of Natural Selection by R.A. Fisher (1930) dictated that sexual dimorphisms may depend upon a single medelian factor. This could be true for some species but his suggestion could not take off the ground as gender in Drosophila is determined by the number of X chromosomes. Technical advances in molecular biology have revived the initial thinking of Fisher and dictate that TDF or SRY genes in humans or Tdy in mice are sex determining genes. The fortuitous findings of XX males and XY female, which are generally termed sex reversal phenomenon, are quite bewildering traits that

Sex determination, Genetic. --- Molecular genetics. --- Genetics --- Molecular biology --- Chromosomal sex determination --- Determination of sex, Genetic --- Genetic determination of sex --- Genotypic sex determination --- Sex --- Sex determination, Genetic --- Gene expression --- Sex chromosomes --- Sex determination --- Cause and determination