1. Which of the following ensures that most genes on one X chromosome are not expressed in female animal cells?   a.Knockout b.Circadian rhythm c.Repressors d,X chromosome inactivation   2. Which of the following is a function of histones in the process of gene expression?   a.They wrap or unwind DNA and affect which DNA regions are accessible to RNA polymerase. b.They transport mRNA to key regions in the cytoplasm. c.They bind to DNA to increase or decrease transcription. d.They modify newly transcribed mRNA sequences.

Q: Which gene program is described correctly? A. Cell division is the process whereby identical cells…

A: Which gene program is described correctly?

Q: In mice, the copy of the Igf2 gene that is inherited from the mother isnever expressed in her…

A: The unit of heredity is a gene. These genes account for different phenotypic and genotypic…

Q: The goal of most gene therapies is to insert a healthy copy of a gene into the genome.  Besides…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Virtually all steps of embryological development depend on: a. Alterations in the genome b. Tumor…

A: Embryological development is the growth and development of embryo by  cell division and cell…

Q: Insulators may exert their effect by a. acting as a barrier to changes in chromatin structure. b.…

A: Insulator sequences are the cis-regulatory DNA sequences that protect the gene from inappropriate…

Q: Pluripotent stem cells (a) lose genetic material during development (b) give rise to many, but not…

A: Pluripotent stem cells are also referred as master stem cells. Such stem cells are able to make all…

Q: Contrast positive versus negative regulation of gene expression. Describe the role of the repressor…

A: Positive and negative control of gene expression In some cases, the product of a regulatory gene is…

Q: Explain the anti-apoptotic role of telomerase and telomeres. In which cell type telomerase is…

A: Apoptosis is the programmed cell death. It is used to remove unwanted cells from the body for…

Q: Master regulatory genes play critical roles in development. Predict the MOST likely fate of a fly…

A: Regulator genes as the name suggest help in controlling the expression of other genes, all genes are…

Q: 3. Figure on the right shows a DNA microarray assay of gene expression levels. In this microarray if…

A: Micro arrays are utilised for the determination of gene expression patterns in specific tissues or…

Q: One of the main questions in the field of developmental biology is how cell differentiation works at…

A: Ans-  How cells become different from each other and carry out distinct functions due to…

Q: What have epigenetic monozygotic twin studies proven? A. Twins have identical epigenomes because…

A: The term epigenetics means something that occurs due to a non-genetic influence on the expression of…

Q: The anterior structure of the Drosophila is promoted by which of the following events?* a. nanos…

A: The Drosophila embryo provides an excellent model for studying gene regulatory networks. In…

Q: 1. After exposure to a mutagen an A-T base pairing becomes T-A in the daughter cell. This is an…

A: Please note, keeping with the site regulations and in order to provide accurate and detailed…

Q: In mammals, sperm contribute the usual haploid genome, a centriole, and a micro RNA for Bcl2.  What…

A: Micro RNA is essential for the early embryogenesis, formation, and maturation of tissues and stem…

Q: How would you introduce the change/modification into the skin cells to transform them into neurons?

A: Every cell in an organism's body contain the same genetic material and genome. It is due to the…

Q: What is the phenotype of the gnom mutant?   A. Loss of cell fate   B. Lack of cell-cell…

A: Introduction Auxin is an important plant hormone that regulates cell division and differentiation…

Q: (1) Explain how cells in the rabbit embryo become specialised after epigenetic modification.

A: The “epigenetic modification” deals with the changes of phenotypes that are heritable. This type of…

Q: Vhich statement about DNA methylation is true? D It requires a histone methylase. D It involves the…

A: DNA is the genetic material. It stands for deoxyribonuceic acid.

Q: 5. discuss different components and types of epigenetic gene regulation 6. define mutation and…

A: Mutation occurs when the base pair sequence of our DNA changes as a result of numerous environmental…

Q: Your friend sends you two cancerous cell lines to examine and determine possible mutations. The…

A: Here we know about cancer development due to mutation.

Q: 2. a. You want to create a genetic construct that will express GFP in Drosophila. In addition to the…

A: Green fluorescent protein (GFP) contains 238 amino acids which are responsible for bright green…

Q: . How do I explain a brief outline of the mechanisms in which DNA is used to generate protein by…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: mutations in breast cancer susceptibility genes BRCA1 & 2 principally cause with ? (a) nucleotide…

A: BRCA1 gene mutations lead to breast cancer in women of around 60% to 80%. Along with that it also…

Q: Vhich statement about DNA methylation is true? D It requires a histone methylase. D It involves the…

A: DNA methylation is a process in which methyl groups are attached to different bases of DNA with the…

Q: 1. After receiving the SR signal, stem cells in the developing organism will have an increased…

A: Gene is unit of DNA that is usually located on a chromosome and that controls the development of one…

Q: The underlying cause(s) of epigenetic changes associated withcancer may bea. mutations in genes that…

A: Epigenetic changes refer to those deoxyribonucleic (DNA) modifications that do not involve any…

Q: Figure 2 illustrates how Pitx1 transcription is regulated in different tissues. The center image is…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 6. Suppose a particular gene is required for early development and also later for development of a…

A: Mosaic analysis with a repressible cell marker is a technique used to create homozygous mutant…

Q: B. What genes are involved in inactivating a human X chromosome?

A: X-inactivation is a process by which one of the copies of the X chromosome present in female mammals…

Q: You genetically engineer a cell line so that the S-Cyclin gene promoter is replaced with the…

A: The alterations of S phase and chromosome Segragtion that is mitosis is important in eukaryotic…

Q: In eukaryotes, chromatin remodeling plays an important role is gene regulation. This is because a.…

A: Chromatin remodeling is the non static change in the structure of chromatin which allows the…

Q: 2. Some mutant corn plants start seed germination while the kernels are still on the cob, a…

A: Vivipary is the phenomenon in which seed germination occurs prematurely while they are still…

Q: The following diagram illustrates four genes from the genome of a certain insect. Different binding…

A: Enhancers are transcriptional activation factors that bind to the upstream region of the promoter…

Q: Dylan Mortimer an artist struggled with Cystic fibrosis a disease causes the body to produce thick…

A: Cystic fibrosis is a progressive disease. Usually it can be detected in a person as early as first…

Q: Why is folate recommended on pregnant women? Connect this to epigenetics.

A: Introduction Nutrients are important for overall growth and development of the organisms. These are…

Q: What piece of a transcript is utilized to localize the mRNA and why is this critical to development?…

A: DNA is transcribed into primary transcript during transcription.

Q: We looked at RNA-mediated mechanisms of gene regulation in both eukaryotes and prokaryotes.  a.…

A: All eukaryotic prokaryotes are homologous to one another and to prokartoyotic RNA polymerase. in…

Q: In a female human cell, what would be the effect on X inactivation if SİRNAS that eliminate the…

A: Introduction  X chromosome inactivation: it is also referred as Lyonization. In this there is…

Q: Transcription factors include ______________.   a. silencers and enhancers     b. promoters and…

A: DNA is the genetic material and made of adenine, guanine, thymine, and cytosine. DNA makes up the…

Q: 14. Complete the following table, which compares late-stage gene regulation mechanisms.

A: The 'Central Dogma' is a process of converting DNA information to RNA, which results in a protein,…

Q: How are the genes in the beta-globin locus different from each other? They have different…

A: Beta-globin is a subunit of hemoglobin, a larger protein found within red blood cells. In adults,…

Q: Q. Both histone deacetylase (HDAC) and Xist would be on a list of genes involved in X chromosome…

A: Histone proteins have positively charged amino acid residues like lysine, arginine. DNA is double…

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.