Using various chemical, lipid or physical methods, this gene transfer technology is a powerful tool to study gene function and protein expression in the context of a cell.
Group work in the lab Research Research projects Evolution of female multiple mating - Why females of nearly all animals tend to mate with more than one male polyandry remains a pressing question for evolutionary biology.
I am examining the direct and indirect benefits to females of polyandry. Males of many insects provide nutritional donations at mating. The consequences of male donations are explored in butterflies and bush-crickets. In other species, females may exercise post-copulatory choice to avoid using sperm of related males to reduce the cost of inbreeding.
Selfish genetic elements and sexual selection - Selfish genetic elements SGEssuch as transposable elements, segregation distorters and maternally inherited symbionts are found in all living organisms where they can cause reproductive incompatibilities, feminization, and killing of sons and sperm resulting in sex ratio distortion.
I am looking at the interactions between SGEs and adaptive female mating patterns: Females may mate multiply to avoid using sperm from males carrying SGEs, by promoting sperm competition as a means to swamp SGE-carrying sperm.
I am examining the impact of SGEs on male fertility in species of flies: Drosophila pseudoobscura X-linked meiotic driver genes causing female biased sex ratios and D. CI-inducing Wolbachia has the potential to affect the population dynamics of their host via reduced offspring production.
I am also investigating the consequences of sex ratio distorting endosymbionts in butterfly populations. Male-killing Wolbachia has dramatic impact on the mating system in the butterfly Hypolimnas bolina across Pacific Islands, which vary in frequency of male killers in collaboration with Greg Hurst at Liverpool.
In Australian Eurema hecabe butterflies Wolbachia feminises genetic males and convert them into functional females collaboration with Darrell Kemp at Macquarie University. Sexual selection and sexual conflict - Female multiple mating creates a conflict of interests between the sexes, since males are selected to attempt to manipulate each female he mates with into putting as much of her resources into his offspring even if this lowers her overall reproductive output.
Sexual conflict has profound implications for our understanding of numerous areas of evolutionary biology including sexual selection, sex determination and speciation.
I am pursuing three lines of research: Sexually antagonistic SA alleles are genes that are advantageous to one sex but detrimental when expressed in the other.
If sex-linked, SA alleles can accumulate even when the advantage to one sex is less than the cost to the other. Recent research has revealed most genes are differentially expressed in male and female metazoans, indicating many loci are SA.
The importance of sex-linkage and differential gene expression for SA alleles is examined in various butterflies and moths, where females are the heterogametic XY sex. Sex-linkage of sexually selected traits are frequent in this insect group.Other Results for Charlotte's Web Pdf Online: Charlotte's Web - Wikipedia.
Charlotte's Web is a children's novel by American author E. B.
White and illustrated by Garth Williams; it was published on October 15, , by Harper. Jan 24, · For revolutionary Light j, both the analysis and the our check a advance book that is the information of the static client.
The faith gives the Pedagogy statistic that the form was, and the Modulation is the list matrix that the reached. A Message from Walden Media Always a man ahead of his time, E.B.
White knew upon the publication of Charlotte’s Web in that someday Hollywood would knock on the wooden door of his Maine farmhouse, asking if Charlotte and Wilbur could come to Los Angeles. Search among more than user manuals and view them online urbanagricultureinitiative.com In the screenplay adaptation of the classic childrens novel, Charlottes Web is brought to life by an all-star cast including Julia Roberts, Dakota Fanning, Steve Buscemi and more.
Charlotte’s Web By E.B. White Chapter 1 Before you read the chapter: The protagonist in most novels features the main character or “good guy”.
One of the main protagonists of Charlotte’s Web is a very likeable eight-year-old girl, Fern, who lives on a farm. Think back on some of your favorite characters from past novels you.