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Evolutionary Genomics Of Dynamic Sex Chromosomes In The Salicaceae, Ran Zhou
Evolutionary Genomics Of Dynamic Sex Chromosomes In The Salicaceae, Ran Zhou
Graduate Theses, Dissertations, and Problem Reports
Identifying the sex-determination region (SDR) and other genomic features of sex chromosomes are of great importance in the studies of the evolution of sex. However, the process of accurately identifying the size and location of the SDR is often difficult, even when a genomic sequence is available. This usually is hindered by large repetitive elements and a lack of recombination in the SDR. In this thesis, I assemble sex chromosomes with whole genomic sequencing data, identify SDRs and explore their genomic features in two sister species from the Salicaceae family. I also develop an interpretation of the lability of the …
A Genomic Investigation Of The Stomach Phenotype In Teleosts, Louis Pfeifer
A Genomic Investigation Of The Stomach Phenotype In Teleosts, Louis Pfeifer
Theses and Dissertations (Comprehensive)
The stomach, which is physiologically defined in vertebrates by its function in acid-peptic digestion, has been lost independently multiple times during the evolution of the teleost fishes. The function of the stomach is facilitated by the proton pump H+/K+-ATPase, which acidifies the stomach, and pepsinogens, which are converted to proteolytic pepsins in this acidic environment. It is well documented that in agastric (stomachless) fish, the genes what code for the expression of this proton pump (atp4a and atp4b) and the pepsinogens (pga, pgb, pgf, pgc and cym,) are absent from the genome …