Chromosomal crossover

Fimicola cross due to the location of the spore color gene about halfway between the centromere and end of the chromosome. Thus, the distance between the gene and the centromere will be 28 map units. Variables • Dependent- Percent of crossover, number of asci showing crossover • Independent- Distance from gene to centromere • Control- Sordaria Fimicola culture, slide, time, strains being crossed, area viewed, temperature, microscope used, age of sample Data Under the microscope, we saw brown asci surrounded by and filled with small, almond shaped spores in two similar shades, gray-purple and black-purple. Some of the spores appeared darker because their color was distorted by the brown color of the remaining…

The Buick brand made quite a bit of noise just ahead of the start of the 2016 North American International Auto Show in Detroit this past weekend. GM’s premium brand introduced two vehicles — a compact crossover SUV and a rear-wheel drive sport coupe. The first model is a production vehicle known as the Buick Envision. The second model is a concept coupe, dubbed the Avista. At this point, only the Envision is assured — the Avista’s place in Buick’s line up has yet to be confirmed. Given that…

The history and background of Edwards Syndrome comes from a man named John Hilton Edwards. He first wrote down his findings after a letter he wrote talking about heredity disorders. Pediatrics was his specialty and he was spending time at the Children’s Hospital in Birmingham when he saw a potential chromosomal disorder in a newborn. Edwards called it trisomy which means type unknown. Then he had some of the tissue tested and founded an extra chromosome. He then re-named named it trisomy…

Trisomy 21 is caused by the failure of the chromosome 21 to separate during sperm or egg development. As a result of this, a sperm or egg is produced with an extra chromosome 21. When it is combined with the other normal cell, the baby has 47 chromosomes out of which 3 are chromosomes 21. In 88% of the cases, trisomy 21 arises from the non-separation of the chromosomes in the mother, 8% from the non-separation of the father and only 3% when the egg and the sperm have merged together to form one.…

deregulated tyrosine kinase activity. The Ph chromosome is an abnormally short chromosome 22 that is one of the two chromosomes involved in a translocation with chromosome 9. A large portion of chromosome 22 is exchanged with a small fragment from a tip of chromosome 9, producing a shortened chromosome 22, called the Philadelphia chromosome. Translocation takes place in a single bone marrow cell and, through the production of many cells from one mutant cell, it causes leukemia. It occurs when a…

takes the form of a ring as soon as its two extremities, the long arm and the short arm, fuse together. The fusion occurs through two ruptured events, one at the extremity of the short arm and the other at the end of the long arm, which usually leads to a partial loss of the informative genetic materil of chromosome 14. The chromosomal abnormality can affect all cells or Mosaic with a cell line that has lost a complete chromosome 14. Chromosomal aberration RING 14 is associated ith a number of…

One mutation in a single human chromosome is all it takes. When a human has an extra copy of chromosome 21, this is referred to a developmental disorder known as Down’s Syndrome or Trisomy 21. An individual with Down’s have three copies of their genes instead of two, therefore disturbing the control of protein production within cells. It is so common and widespread that 1 out of every 800 to 1,000 babies are affected by Down’s Syndrome (FamilyDoctor). This means, according to the article…

Down Syndrome is the most prevalent and recognizable chromosomal abnormality in live born children, with a current prevalence of 2.8 out of 1000 children born with the genetic disorder [1]. In 1866, John Langdon Down termed the condition “mongolism” before it was later termed Down syndrome in honor of his discovery. Nearly a century later, geneticists Jerome Lejeune and Patricia Jacobs reported the chromosomal abnormality for the first time in humans to be secondary to a trisomy of chromosome 21…

Genetic Diseases And Disorders Research Paper Down syndrome is a disorder of a person's chromosomes that cause mild to severe physical and mental disabilities. People are affected from birth and until death. Noticeable physical problems include a small skull , a narrowed or flat nose bridge, poor muscle tone, and folds beneath the eyes. It occurs in about one in every 700 births. Nearly 1600 kids are born with down syndrome in the united states. Most people that have down syndrome have…

diagnostic test provides almost 100% accuracy when diagnosing a fetus with Down syndrome. This procedure involves chronic villus sampling (CVS, performed in the first trimester) and amniocentesis (performed in the second trimester). Although this procedure has a one percent risk of causing a miscarriage, there is a close to 100% chance of accurately diagnosing Down syndrome. If not diagnosed prenatally, once a baby is born, Down syndrome can easily be detected by certain physical traits. These…