31. Define gene mutation. Describe the kinds of gene mutations. 32. Define chromatin. What are chromosomes?...
31. Define gene mutation. Describe the kinds of gene mutations.
32. Define chromatin. What are chromosomes? What are nucleosomes? How many chromosomes do humans have (diploid number)?
Homework Answers
31. A gene mutation is a permanent modification in a gene sequence, such that the sequence varies from generally found sequence in compare to other people.
Gene mutations have two categories-
Hereditary mutations or germline mutations inherit from parents and remain heritable throughout the generations.
Second kind is Acquired (or somatic) mutations that occur through environmental factors, errors in DNA amplification, protein formation or transcription, and induce by chemicals.
32. Chromatin is the complex form of macromolecules DNA, protein, and RNA. Chromatin is a very crucial structure present in the cell. It helps in compaction of large DNA molecule into nucleus, reopen when requires and prevention of the DNA.
The eukaryotic chromatin needs an important part of chromatin- the histone protein. The chromosome is an invisible thread like structure that made of complex by the histone protein with the DNA molecule. Each chromosome segregates in centromere and the short arm knows as p arm while the long arm as q arm.
Nucleosomes are the coiled structure of DNA around the histone protein, through them DNA is capable to arrange in very compact and dense structure- the chromosome.
Human have 23 pairs of chromosomes that are showing the diploid number of chromosome.
Add Answer to:
31. Define gene mutation. Describe the kinds of gene
mutations.
32. Define chromatin. What are chromosomes?...
For each ploidy indicate the number of homologous chromosomes Haploid Diploid Triploid Tetraploid There are several...
For each ploidy indicate the number of homologous chromosomes Haploid Diploid Triploid Tetraploid There are several types of genetic mutations at different levels (DNA, Chromosome, Gene Product). Name two Describe what they have in common Describe how they are different
Gene Mutation Worksheet 1. There are several types of gene mutations. (a) List two. (b) What...
Gene Mutation Worksheet 1. There are several types of gene mutations. (a) List two. (b) What do they have in common? (c) How are they different? 2. A geneticist found that a particular DNA mutation had no effect on the protein coded by a gene. What kind of mutation was this? Why? 3. (a) Name one amino acid that has more than one codon. (b) Name an amino acid that has only one codon 4. Look at the following sequence:...
You have been studying a gene involved in the biosynthesis of histidine and have isolated a...
You have been studying a gene involved in the biosynthesis of histidine and have isolated a number of mutants that do not grow in the absence of exogenous histidine. Cells carrying the first mutation produce a protein ~10% of the size of the wild-type protein. What kinds of mutations could have caused this defect? Select all that apply. A.Missense Mutation B.Frameshift Mutation C.Nonsense Mutation D.Neutral Mutation
Please answer 2-5 2. Consider a gene with a particular function. Mutation X and mutation Y...
Please answer 2-5
2. Consider a gene with a particular function. Mutation X and mutation Y cach cause defects in the function of the encoded protein, yet a gene containing both mutations X and Y encodes a protein that works even better than the original protein. The odds are exceedingly small that a single mutational event will generate both mutations X and Y. Explain a simple way that an organism with a mutant gene containing both mutations X and Y...
Gene Regulation Describe the regulation of the lac operon in E. coli. a. the structure of...
Gene Regulation Describe the regulation of the lac operon in E. coli. a. the structure of lac operon in E.coli. b. Role of CAP and cAMP the activator binding site c. Role of Lac Repressor and Operator and Inducer d. Role of Looping e. Effect of mutations f. Recessive v dominant mutations g. Complementing v noncomplementing mutations. Describe the regulation of the trp operon in E. coli. Describe at least three kinds of molecular switches involved in gene regulation. What...
Inheritance and Mutations in a Single-Gene Disorder (10pts - all questions worth 0.5pts) Some diseases are...
Inheritance and Mutations in a Single-Gene Disorder (10pts - all questions worth 0.5pts) Some diseases are caused by the environment. For example, exposure to chemicals or extremely bright lights can cause certain forms of blindness. But other forms of blindness are inherited, meaning that they are passed on from one generation to another. In this activity, you will learn about a young woman, Molly Troxel, who has an inherited form of blindness called Leber congenital amaurosis (LCA). The activity explores...
1. In humans, X and Y chromosomes are technically not homolous Explain how X and Y...
1. In humans, X and Y chromosomes are technically not homolous Explain how X and Y chromosomes pair up in cells of males prior to cell division 2. Familial breast cancer is caused by mutations in the BRCA1 gene which is located on human chromosome 17. Females with a mutation in BRCA1 gene have an 80% lifetime risk of developing breast cancer. Therefore, out of 100 women who carry the disease-causing mutation, only 80 will develop breast cancer. Why is...
8. (6) There are three common types of point mutations that can affect the coding sequence...
8. (6) There are three common types of point mutations that can affect the coding sequence of proteins. What are these mutations? How do the mutations change the mRNA sequence and consequently the protein? 9. (2) If you were to suggest gene therapy to the family, how you describe what the main goal of this therapy is? 10. (2) Different virus have been used as vectors for gene therapy. Andenoviruses are one example that have been used in humans. What...
9. Imagine an organism with a diploid number of 16. How many chromosomes would be present...
9. Imagine an organism with a diploid number of 16. How many chromosomes would be present in a typical cell during the G1 phase of the cell cycle? (Just give a number!) 10. Imagine an organism with a diploid number of 16. How many chromatids would be present during the G1 phase of the cell cycle? (Just give a number!) (2) 11. Imagine an organism with a diploid number of 16. How many chromatids would be present just before the...
Answer Choices: A) Only one of the strains has a mutation in an eye color gene....
Answer Choices:
A) Only one of the strains has a mutation in an eye color
gene.
b) Strains C and D have mutations in different genes.
C) Strains C and D have mutations in the same gene.
D) More information is needed to infer the location of
mutations.
! Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A–G). In each strain, the white eye trait is due to...
Gene Mutation Worksheet 1. There are several types of gene mutations. (a) List two. (b) What do they have in common? (c) How are they different? 2. A geneticist found that a particular DNA mutation had no effect on the protein coded by a gene. What kind of mutation was this? Why? 3. (a) Name one amino acid that has more than one codon. (b) Name an amino acid that has only one codon 4. Look at the following sequence:...
Please answer 2-5
2. Consider a gene with a particular function. Mutation X and mutation Y cach cause defects in the function of the encoded protein, yet a gene containing both mutations X and Y encodes a protein that works even better than the original protein. The odds are exceedingly small that a single mutational event will generate both mutations X and Y. Explain a simple way that an organism with a mutant gene containing both mutations X and Y...
Inheritance and Mutations in a Single-Gene Disorder (10pts - all questions worth 0.5pts) Some diseases are caused by the environment. For example, exposure to chemicals or extremely bright lights can cause certain forms of blindness. But other forms of blindness are inherited, meaning that they are passed on from one generation to another. In this activity, you will learn about a young woman, Molly Troxel, who has an inherited form of blindness called Leber congenital amaurosis (LCA). The activity explores...
1. In humans, X and Y chromosomes are technically not homolous Explain how X and Y chromosomes pair up in cells of males prior to cell division 2. Familial breast cancer is caused by mutations in the BRCA1 gene which is located on human chromosome 17. Females with a mutation in BRCA1 gene have an 80% lifetime risk of developing breast cancer. Therefore, out of 100 women who carry the disease-causing mutation, only 80 will develop breast cancer. Why is...
Answer Choices:
A) Only one of the strains has a mutation in an eye color
gene.
b) Strains C and D have mutations in different genes.
C) Strains C and D have mutations in the same gene.
D) More information is needed to infer the location of
mutations.
! Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A–G). In each strain, the white eye trait is due to...
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