All sorts of mutations changes in the genetic code – lesson – teachengineering hair electricity dance moms


So, we have identified three superheroes who all gained some sort of special abilities from mutations. For Cyclops and any of the d cypha electricity futures X-Men, the powers were caused by a pre-birth DNA or genome mutation. The Hulk and Spiderman powers happened a little differently since the mutations occurred later when they were exposed to radioactivity in some form or another.

Today we will discuss some of the science behind mutations. While the superpowers and abilities we just discussed may be fictional, it is true that mutations can have significant impacts on people and evidence exists that radiation exposure can lead to an increased rate of mutations. First, we will discuss the different types of mutations, then where or how they can occur. We will also talk about some environmental factors that can influence the rate of mutations, and finish gastritis by looking at some possible effects of mutations.

(Slide 4) Types of Mutations: Mutations can be classified several different ways. In this lesson, we will focus on sorting mutations by their effects on the structure of DNA or a chromosome. For this categorization, mutations can be organized into two main groups, each with multiple specific types. The two general categories are small-scale and large-scale mutations.

(Slide 5) Also referred to as a “point” mutation, substitutions occur when a nucleotide is replaced with a different nucleotide in the DNA sequence. The most common gas and water substitutions involve the switching of adenine and guanine (A ↔ G) or cytosine and thymine (C ↔ T). Since the total number of nucleotides is conserved, this type of mutation only affects the codon for a single amino acid.

(Slide 6) A deletion is the removal of a nucleotide from the DNA sequence. Deletions are referred to as “frameshift” mutations power outage houston reliant because the removal of even a single nucleotide from a gene subsequently alters every codon after the mutation (it is said that the reading frame is “shifted”); this is illustrated in Figure 1 for both deletions and insertions. The change in the number of nucleotides changes which ones are normally read together.

(Slide 19) Often, large-scale mutations lead to cells that are not viable (and die due to the mutation). This is especially true with nondisjunction mutations in gametes in which entire chromosomes are missing or extra. In humans, when the gamete from a male (sperm) merges gas bloating diarrhea its chromosomes with the gamete from a female (egg), the offspring receive 23 chromosomes from each parent to form 23 homologous pairs, as shown in the karyotype in Figure 4. However, when one of the gametes has a nondisjunction mutation, the resulting offspring end up with only one homolog in a pair (monosomy) or with three homologs in a pair (trisomy). Most of the time, these offspring are not gas vs electric oven viable. The ones that do result in viable offspring will possess some noticeable differences due to the extra or missing chromosome; this alteration leads to a permanent syndrome in the offspring. The most well-known syndrome is trisomy 21, an extra 21 st chromosome (this karyotype is shown in Figure 5); this particular nondisjunction mutation leads to Down syndrome.

(Slide 20) What can influence mutations? Mutations naturally occur over time, which is the underlying cause of evolution. As we can see, evolution is a very slow process with a net benefit to an organism, but some environmental factors electricity units of measurement may influence or induce additional mutations. These induced mutations often lead to harmful diseases, such as cancer.

Exposure to certain chemicals is one environmental factor that may induce DNA mutations. Typically, anything that we identify as carcinogenic (may cause cancer) has negative side effects on DNA, and may lead to cancer. This includes the chemicals found in cigarette smoke as well as those found in meats gas x directions cooked on the grill. These chemicals belong to a larger class called mutagens, meaning they can lead to changes in genetic material.

Chemicals are not the only types of mutagens that we encounter; physical mutagens also exist in the environment, namely radiation. Ultraviolet radiation from the sun can damage genetic material by changing the properties of nucleotides in the DNA. Overexposure to ultraviolet radiation is known to lead to skin cancer. X-rays and gamma radiation are also physical mutagens and forms of ionizing radiation; this means that these types of radiation possess enough energy gas upper stomach to remove electrons from atoms, thus forming ions and affecting how different biomolecules interact. While a typical dose of x-rays received during a medical procedure is low, it does marginally increase a person’s cancer risk.

Alternatively, retroviruses such as HIV naturally experience mutations at a much higher rate than other organisms, which can be attributed to the fact that they possess RNA instead of DNA. The process by which RNA is copied and replicated is not as precise as that of DNA. Therefore, by the time our gas tax in texas immune system has adjusted to fight a virus like HIV, the HIV virus has already mutated again and the immune system must start over. The mutations in the HIV’s RNA lead to alterations in the protein markers on the virus that the immune system targets, and if the target is always changing, it is almost impossible for the immune system to remove the virus.

(Slides 21-22) Engineering Connection: While mutations occur naturally over time, biological engineers are able to genetically modify various organisms electricity in the body symptoms. Humans have been genetically modifying plants and animals for thousands of years. Humans have accomplished this by selectively breeding or inbreeding in order to produce and “improve” specific traits, such as breeding watermelons to be larger and have fewer seeds or breeding chickens to have more white meat and more breast meat.

With the advancement of technology, engineers can directly manipulate the genetic code of plants and animals. Some examples of genetically modified (and controversial) organisms include disease-resistant papaya, vitamin A-rich rice and drought-tolerant corn. Currently, researchers are studying gene editing in the womb. If it is determined that an unborn child has a disease or disability, then we may one gas definition state of matter day be able to edit the genes of the unborn child and prevent the issue from appearing in the child.

• Mutation Telephone – As a way to illustrate how DNA mutations can happen, students conduct an activity similar to the childhood “telephone” game that models the biological process related to the passage of DNA from one cell electricity of the heart to another. Then, students act as predators to test how various mutation types (normal, substitution, deletion or insertion) affect the survivability of an organism in the wild, which serves as a demonstration of natural selection based on mutation.