Genetic linkage

Abstract: This experiment was meant to look and find gene linkages and determine the crosses of the tan x wild type (black), gray x wild type (black), and tan x gray spores of the Sordaria fimicola. To accomplish the crossing, the plates filled with auger had to be set up with each individual kind of spore. Three plates with two different spore colors of sordaria in each. One plate was black and tan, black and gray, and gray and tan. For gene to centromere distance the standard deviation was…

Lethal alleles Lethal alleles cause death of the organism that transports them, normally they are the result of genetic mutations in the genes which are vital to growth and development. Lethal alleles can be recessive, dominant or conditional depending on the genes involved. Examples of the mutations caused by the lethal alleles are cystic fibrosis and sickle cell anaemia. Incomplete dominance Incomplete dominance is a part of inheritance, when one allele for a precise trait isn’t completely…

The genes for red eyes along with gray bodies are close together, which is why red-eyed fruit flies’ bodies tend to be gray. The Mendel law that it violates is independent assortment. Crossing over can affect linkage because if a chromosome it changes the genes, therefore making more recombinants available. The more space genes have between each other, the higher the rate of crossing over is. Meanwhile if there isn’t much space, the chances of crossing over isn’t…

Lillian M. Cosentino University of North Carolina Wilmington Rachel Hanson BIOL 335-204 7 October 2015 Determining mode of inheritance for eyeless mutation in Drosophila melanogaster Abstract: The purpose of this experiment is to determine the mode of inheritance for the eyeless mutation in Drosophila melanogaster, whether it be autosomal or sex-linked. I hypothesized that the eyeless mutation in Drosophila melanogaster is inherited…

used to observe the basic genetic mechanism, leading to understanding the mode of inheritances of other organisms since they all share similar genetic approach. Background Mendelian genetic is considered to the classic for genetic. There are three Mendel’s laws of genetics: the law of dominance, the law of segregation, and the law of independent assortment. The Mendel law of dominance…

There is another point to consider in genetics and anorexia. It is that maybe genetics and environment together can cause the onset of anorexia. There are two ways this can happen. One is gene-environment interaction, which basically means that if a person has a certain gene and is placed in the right environment…

bacteria have only one. Archaea have cell walls that lack peptidoglycan and have membranes that enclose lipids with hydrocarbons rather than fatty acids. These lipids in the membranes of archaea are unique and contain ether linkages between the glycerol backbones rather than ester linkages. Archaea resembles eukaryotes more than bacteria. Their ribosomes work more like eukaryotic ribosomes than bacterial ribosomes. whereas bacteria live in "moderate" environments, archaea are usually thought of…

Paul Berg’s method for inserting foreign genetic information into DNA of SV40 was truly a paradigm shift. No longer was the study of molecular biology purely observational, Dr. Berg’s discovery gave scientist the traction to synthetically modify and transduce foreign DNA into a desired host. Because of this, not much was known about this type of genomic modification. Except for the knowledge that SV40 DNA possessed the ability to insert its genetic information into a host genome and the…

Originally it was believed that all traits are blended together. Due to the work of Gregor Mendel, though, it was shown that characteristics are a result of inherited factors, known as genes1. Genes are units of heredity on a chromosome that bring about our existence and create diversity. This diversity arises from the fact that there are different forms of genes known as alleles. All the alleles of an organism are referred to as that organism’s genotype and results in an organism’s phenotype,…

offspring and the offspring are created in a very fast fourteen-day cycle. The mutations are easy to identify because the traits that are affected are noticeable. (1) It contains only a few chromosomes. The only ones that contain a significant amount of genetic information are chromosomes two, three, and X. The female…