Genetics of ascospore color in sordaria lab essay

Evolution Canyon serves as a model for microevolution and can be used to study how mutation and recombination contribute to adaptation and genetic diversity. The second part of the experiment is devoted to measuring the uptake of oxygen.

AP Biology Laboratory Review

The third experiment shows the effect of inhibiting the sodium transport on the transepithelial potential. Directions for lab Observe 10 photos of Sordaria asci. Using Nucella lapillus, a species of dogwhelk, these experiments compare substantial samples of dogwhelks taken from both locations.

The two divisions are called Meiosis I and Meiosis II and they result in the production of four haploid gametes. Which allele is dominating is very tough to say, because paramount and recessive does not apply in this case.

The results provide evidence that mechanisms controlling mutation and recombination may adapt heritable changes in response to the harsh climatic demands, particularly with the SFS. All of the 8 asci spores are tan. The process begins with one single parent diploid cell that contain homologous chromosomes that divides into four daughter haploid cells which each contain half the number of chromosomes that the original parent cell contained.

Black and tan cross To the right is a photo of asci that resulted from a cross between black and tan strains. Simulation of Meiosis In this part of the lab, a chromosome simulation kit was used to demonstrate meiosis.

Decomposing fruit and bread are used as examples of how the final life cycle, death, produces new life-in these cases, bacteria and mold.

lab 3 sample ap mitosis & meiosis

How many cells and what type of cells are created from meiosis. Meiosis and crossing over occurs in the production of gametes and spores. The only change is the number of chromosomes. In this experiment, leaf materials containing different types of plastid are prepared for electron microscopy to provide insight into their ultrastructure, ontogeny, and interrelationships in respect to photosynthesis.

Linking architecture, machine design, computer science, and other disciplines, this Science Screen Report offers a fresh way of understanding human anatomy.

The structures which can be negatively stained are much smaller than those studied with the light microscope.

Genetics of Ascospore Color in Sordaria lab

Meiosis is more complex and involves two nuclear divisions. These have been chosen because they scatter electrons strongly and also adsorb to biological matter well. This program illustrates the experimental techniques involved in the genetic analysis of an ascospore color mutant in Sordaria.

Two self-sterile but interbreeding strains are used. Mutations are induced by ultraviolet irradiation which result in the inability to form the black melanin pigment normally present in the ascospore. Negative staining is an established method, often used in diagnostic microscopy, for contrasting a thin specimen with an optically opaque hazemagmaroc.com this technique, the background is stained, leaving the actual specimen untouched, and thus visible.

Biology DVDs

This contrasts with 'positive staining', in which the actual specimen is stained. Sordaria, like other organisms, exhibits genetic variants that result in phenotypes that are qualitatively different from the common (wild-type) phenotype. One character that exhibits several different variant types is the color of the ascospores.

Sordaria Meiosis Lab. Sample of Sordaria in petri dish.

The common wild-type has black ascospores, but strains with red, pink, gray and tan ascospores. Stoudt 1 Jocie Stoudt Bio H Sordaria Lab Report Introduction Sordaria fimicola reproduce through meiosis which.

consists of the phases Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, and Telophase II. Crossing over in meiosis plays a 5/5(2). Genetic Variation in Sordaria Finicola Introduction: The purpose of the Sordaria Lab was to explore the affects of genetic variation caused by meiosis and to record how sexual reproduction] affects the amount of crossing over in certain strains of Sordaria Fimicola.

These organisms are ascomycetes and are also known as sac fungi. Stoudt 1 Jocie Stoudt Bio H Sordaria Lab Report Introduction Sordaria fimicola reproduce through meiosis which. consists of the phases Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, and Telophase II.5/5(2).

Genetics of ascospore color in sordaria lab essay
Rated 4/5 based on 96 review
Essay on Genetics of Ascospore Color in Sordaria lab