Which event would most likely cause a change in a genetic sequence?
A mutation is a change in the sequence of an organism's DNA. What causes a mutation? Mutations can be caused by high-energy sources such as radiation or by chemicals in the environment. They can also appear spontaneously during the replication of DNA.
Which change in a sample of pond water could indicate that heterotrophic microbes were active?
which change in a sample of pond water could indicate that heterotrophic microbes were active? d-decrease in carbon dioxide level.
How does natural selection affect populations Regents?
It increases competition between populations that occupy different niches, increasing the chance of extinction of the less-adapted species.
Which statement provides the best explanation for the increase growth of the fish in the pond?
the best explanation for the increased growth of the fish in the pond? The expression of genetic information in the fish was influenced by their surroundings. Which type of pathogenic microbe causes AIDS? Which reproductive process determines the traits present in the cluster of cells?
What generally is the fate of mutations to the genome that have harmful consequences to an organism?
In addition to its role in DNA repair, homologous recombination is also responsible for generating genetic diversity during what process? What generally is the fate of mutations to the genome that have harmful consequences to an organism? A. They are always fixed by DNA repair.
What type of mutation must occur to alter the amino acid sequence of a polypeptide chain from the point of mutation to the end of polypeptide chain?
Insertion and deletion point mutations alter the reading frame from the point of mutation to the end of the gene.
How do some human white blood cells help destroy pathogenic bacteria?
Phagocytes are a type of white blood cell that move by amoeboid action. They send out pseudopodia which allows them to surround invading microbes and engulf them. Phagocytes release digestive enzymes which break down the trapped microbes before they can do any harm. This process is called phagocytosis.
Which statement correctly describes the genetic makeup of the sperm cells produced by a human male?
The diagram represents a single-celled organism, such as an amoeba, undergoing the changes shown. Which statement correctly describes the genetic makeup of the sperm cells produced by a human male? Each cell has pairs of chromosomes and the cells are usually genetically identical.
How do mutations contribute to the changes in a population’s interactions with the environment?
The genetic variability created by the mutation will be tested by natural selection, which determines what characteristics are inherited in a population over time. Beneficial mutations are passed on and harmful mutations are eliminated as organisms adapt to changing environmental conditions and evolve.
How can we use environmental and genetic factors to explain changes in organisms?
Environment Can Impact Phenotype Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype.
Which of the following statements provides the best analysis of what happens to freshwater lakes that are polluted by nitrates and phosphates?
Which of the following statements provides the best analysis of what happens to freshwater lakes that are polluted by nitrates and phosphates? B. Nitrates and phosphates promote excessive algae growth, which uses up oxygen needed by other plants and animals.
How deep does a farm pond need to be for fish to survive the winter?
During the coldest parts of winter, your pond must not freeze all of the way through. There should be enough unfrozen water at the bottom of the pond for your fish to ride out the winter. As a rule of thumb, ponds need to be at least 18 inches deep, ideally 24 inches or more, to overwinter fish.
How does mutation related to the traits including diseases that are being inherited by the offspring from their parents mutation?
If an acquired mutation occurs in an egg or sperm cell, it can be passed down to the individual's offspring. Once an acquired mutation is passed down, it is a hereditary mutation. Acquired mutations are not passed down if they occur in the somatic cells, meaning body cells other than sperm cells and egg cells.
How do chromosome mutations and gene mutations differ from each other?
Chromosome mutations can result in changes in the number of chromosomes in a cell or changes in the structure of a chromosome. Unlike a gene mutation which alters a single gene or larger segment of DNA on a chromosome, chromosome mutations change and impact the entire chromosome.
When a mutation occurs by elimination of one base in a DNA sequence this mutation is called a?
Definition. A frameshift mutation in a gene refers to the insertion or deletion of nucleotide bases in numbers that are not multiples of three.
How does each of your mutations affect the amino acid sequences are the mutations missense mutations silent mutations or nonsense mutations?
If a point mutation changes the amino acid, it's called a MISSENSE mutation. If a point mutation does not change the amino acid, it's called a SILENT mutation. If a point mutation changes the amino acid to a “stop,” it's called a NONSENSE mutation.
What is the role of the phagocytes and lymphocytes in protecting the body from invading organisms?
Some types of white blood cells, called phagocytes (FAH-guh-sytes), chew up invading organisms. Others, called lymphocytes (LIM-fuh-sytes), help the body remember the invaders and destroy them. One type of phagocyte is the neutrophil (NOO-truh-fil), which fights bacteria.
Which blood cells are involved in protecting the body from pathogens and foreign cells?
White blood cells, also known as leukocytes, are responsible for protecting your body from infection. As part of your immune system, white blood cells circulate in your blood and respond to injury or illness.
What would the ploidy of the zygote be if egg and sperm were produced by mitosis?
If the egg and sperm were produced by mitosis, each would be diploid, so the zygote would be tetra- ploid (four sets of chromosomes).
How migrants change genetic diversity within a population?
Migrants change the distribution of genetic diversity among populations, by modifying allele frequencies (the proportion of members carrying a particular variant of a gene). High rates of gene flow can reduce the genetic differentiation between the two groups, increasing homogeneity.
How does gel electrophoresis allow researchers to observe genetic variation?
How does gel electrophoresis allow researchers to observe genetic variation? Gel electrophoresis enables scientists to distinguish allele variants of a gene. The Hardy-Weinberg equation can be used to predict genotype frequencies from ______ frequencies.
How do genetic factors environmental factors and pathogenic agents affect both individuals and public health?
Genetic factors are very important because genes make our strong immune system that is not badly affected by weak traits or disease. Environmental factors are important because they can cause/spread disease.
What is gene environment interaction also discuss methods of its analysis?
Gene–environment interaction is defined as “a different effect of an environmental exposure on disease risk in persons with different genotypes,” or, alternatively, “a different effect of a genotype on disease risk in persons with different environmental exposures.” Under this strictly statistical definition, the …
Which of the following statements provides the best analysis of what happens to freshwater lakes that are polluted by nitrates and phosphates quizlet?
Which of the following statements provides the best analysis of what happens to freshwater lakes that are polluted by nitrates and phosphates? B. Nitrates and phosphates promote excessive algae growth, which uses up oxygen needed by other plants and animals.
What causes eutrophication The sudden growth of algae in lakes rivers and oceans?
Nutrient pollution, a form of water pollution, is a primary cause of eutrophication of surface waters, in which excess nutrients, usually nitrogen or phosphorus, stimulate algal and aquatic plant growth. A common visible effect of eutrophication is algal blooms.
How do you keep goldfish outside in the winter?
Koi, Shubunkins and most goldfish survive winter by staying inactive at the bottom of the pond where the water remains a constant cold temperature. Circulating the water during the winter will cause fluctuations in the water temperature and may adversely affect fish in their state of hibernation.
How do you transfer goldfish from pond to tank?
0:477:50Moving goldfish in from the pond – YouTubeYouTube
How does the inheritance pattern of mitochondrial DNA differ from inheritance of single gene traits?
How does the inheritance pattern of mitochondrial DNA differ from inheritance of single-gene traits? -this is because only the oocyte or egg contains mitochondria and not the sperm head. Even if the mitochondria enter the egg from the sperm cell's midsection, it is selectively destroyed.
How do we inherit genes describe the process used to pass genetic information down to offspring?
One copy is inherited from their mother (via the egg) and the other from their father (via the sperm). A sperm and an egg each contain one set of 23 chromosomes. When the sperm fertilises the egg, two copies of each chromosome are present (and therefore two copies of each gene), and so an embryo forms.
How many letters are changed in the DNA to cause sickle cell anemia?
Sickle-cell anemia is one of hundreds of life-threatening disorders that are known to be caused by a change in just one of those 3 billion A's, T's, C's, or G's.