How is DNA passed to new cells during cell division?
In particular, eukaryotic cells divide using the processes of mitosis and meiosis. Mitosis is common to all eukaryotes; during this process, a parent cell splits into two genetically identical daughter cells, each of which contains the same number of chromosomes as the parent cell.
Is a change in DNA that is passed onto daughter cells?
As opposed to germ-line mutations, somatic mutations occur in cells found elsewhere in an organism's body. Such mutations are passed to daughter cells during the process of mitosis (Figure 2), but they are not passed to offspring conceived via sexual reproduction.
Which best describes the outcome of DNA replication?
The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides. This is why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, half is brand new.
What is the result of a mutation during replication?
Replication errors can also lead to insertion and deletion mutations. Not all errors in replication are point mutations. Aberrant replication can also result in small numbers of extra nucleotides being inserted into the polynucleotide being synthesized, or some nucleotides in the template not being copied.
Which of the following best describes how the amount of DNA in the cell changes during M phase?
Which of the following best describes how the amount of DNA in the cell changes during M phase? The amount of DNA is halved as the cell divides into two daughter cells.
How did the DNA suffer a mutation?
This DNA has suffered a mutation, either through mis-copying (when its parent cell divided), or through the damaging effects of exposure to radiation or a chemical carcinogen.
How does DNA mutate?
Definition. A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Which best describes genetic mutations?
1 Answer. A genetic mutation is a random change in the DNA that is passed on further generations of cells and or organisms.
Which best describes the outcome of DNA replication quizlet?
Which best describes the outcome of DNA replication? The new DNA molecule is identical to the original DNA.
What happens when there is a mutation in DNA?
When a gene mutation occurs, the nucleotides are in the wrong order which means the coded instructions are wrong and faulty proteins are made or control switches are changed. The body can't function as it should. Mutations can be inherited from one or both parents. They are present in the egg and/ or sperm cells.
Which of the following statements best predicts the effect of a mutation that results in a loss?
Which of the following statements best predicts the effect of a mutation that results in a loss of the glucocorticoid receptor's ligand binding function? The glucocorticoid receptor will remain associated with the accessory proteins.
How does DNA replication affect the number of chromosomes in the cell cycle?
Following DNA replication, the DNA content doubles again to 4c, but each pair of sister chromatids is still counted as a single chromosome (a replicated chromosome), so the number of chromosomes remains unchanged at 2n.
What can change DNA?
Environmental exposure to certain chemicals, ultraviolet radiation, or other external factors can also cause DNA to change. These external agents of genetic change are called mutagens.
Why do gene mutations occur?
If the complex system involved in copying DNA fails, or if bad things are present in the environment, a mistake in the sequence of DNA can occur. These mistakes, called mutations, can happen at any phase of life, beginning with a growing baby's first cells all the way to an adult's mature cells.
Which of the following best describes mutation?
Explanation: Mutations are random errors in the genetic code.
How does mutation occur?
A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
Which statement best describes a DNA mutation quizlet?
Which statement best describes a DNA mutation? A permanent change occurs in the nucleotide sequence of DNA.
Which of the following statements best describes how the strands of DNA are oriented in relation to each other?
Which of the following statements best describes how the strands of DNA are oriented in relation to each other? DNA is anti-parallel, so one strand runs 5' to 3' and its complementary strand runs 3' to 5'. for every adenine on one strand, there is a thymine bound to it on the opposing strand.
What is DNA mutation and how does it occur?
A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
Which of the following statements best predicts the effect of a mutation that results in a loss of the glucocorticoid receptor’s ligand binding function quizlet?
Which of the following statements best predicts the effect of a mutation that results in a loss of the glucocorticoid receptor's ligand binding function? The glucocorticoid receptor will remain associated with the accessory proteins.
How does DNA change during meiosis?
When recombination occurs during meiosis, the cell's homologous chromosomes line up extremely close to one another. Then, the DNA strand within each chromosome breaks in the exact same location, leaving two free ends. Each end then crosses over into the other chromosome and forms a connection called a chiasma.
How do mutations affect DNA?
Mutations include changes as small as the substitution of a single DNA building block, or nucleotide base, with another nucleotide base. Meanwhile, larger mutations can affect many genes on a chromosome. Along with substitutions, mutations can also be caused by insertions, deletions, or duplications of DNA sequences.
What happens when DNA is mutated?
When a gene mutation occurs, the nucleotides are in the wrong order which means the coded instructions are wrong and faulty proteins are made or control switches are changed. The body can't function as it should. Mutations can be inherited from one or both parents. They are present in the egg and/ or sperm cells.
What are mutations in DNA?
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Which best describes genetic mutations quizlet?
Which best describes genetic mutations? Some inherited genetic mutations can be good for the offspring. Different genetic mutations cause few forms of cancer. Somatic mutations can be inherited from parents or acquired during life.
Which statement best describes genetic mutations?
1 Answer. A genetic mutation is a random change in the DNA that is passed on further generations of cells and or organisms.
Which best describes a mutation?
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Why is one strand of DNA replicated as leading strand and another as lagging strand?
Due to the antiparallel orientation of the two chromosomal DNA strands, one strand (leading strand) is replicated in a mostly processive manner, while the other (lagging strand) is synthesized in short sections called Okazaki fragments.
Which of the following best explains how mutations cause changes to protein structure?
Which of the following best explains how mutations cause changes to protein structure? Mutations in DNA mean that the instructions for making proteins are changed, possibly resulting in different proteins being synthesized.
Which of the following is the most likely explanation for how a mutation in the DNA could result?
Which of the following is the most likely explanation for how a mutation in the DNA could result in the loss of the carboxyl terminus of the HBB protein? The mutation changes a codon in the coding region of the HB transcription to a stop codon such that translation terminates earlier than it should.