What is the signaling pathway that mediates the organizing activity of the A/P organizer in the Drosophila wing disc? Describe two experiments that suggest this pathway functions to organize pattern and promote growth along the anterior/posterior axis of wing imaginal discs.
Q: Explain how the following affect membrane fluidity: – Level of phospholipid tail saturation – Level…
A: The thin, living, elastic, semipermeable lipoproteinaceous membrane that is present around the cell…
Q: In aseptic technique, what will happen if the inoculated solid plated media is not inverted prior to…
A: Culture Media Culture media also known as growth media may be liquid, semisolid, or solid, is use…
Q: Explain Darwin's Theory of Natural Selection using these terms: exponential rate of increase,…
A: Charles Darwin, the author of 'Origin of Species was a born naturalist. He is known for the most…
Q: 8. Explain how buffer systems are important in organisms. In the human body, bicarbonate and…
A: A buffer system is important for a living thing as it helps to maintain a constant chemical internal…
Q: How does tris act as a buffer? What about its composition allows it to act like a buffer?
A: Protein electrophoresis and western blotting both require tris buffers. Tris is used as a buffer in…
Q: development of the genetically engineered foods (genetically modified organism or GMOs)? Find…
A: Genetically modified organisms are organisms in which the genetic material has been altered in a way…
Q: 20 Assume height in humans is determined by three genes. A, B, and C each of which also occurs as a…
A: Introduction: Multi-gene-influenced features are referred to as polygenic traits. Height and eye…
Q: Define "synapomorphy" and "symplesiomorphy".
A: Animals are classified on the basis of similarities and dissimilarities. Cladistics recognises two…
Q: Bacteria can evolve.
A: Bacteria are the unicellular prokaryotic organisms. They have a short life span and they divide…
Q: Approximately O 90 60 30 10 % of chromatin is actually composed of DNA.
A: Thread like coiled, elongated structure, present in nucleoplasm and stained with basic stain and…
Q: Which arrow in the diagram of transcription below is labeling the 'SENSE DNA strand? Note that the…
A: A DNA sequence is transcribed into an RNA molecule with the help of the enzyme RNA polymerase is…
Q: Introduction: The introduction explains the purpose and objectives of the experiment. A good way to…
A: The collection of methods in biology known as "experimental biology" focus on using experiments to…
Q: Translate the mRNA into a protein using the genetic code. (Amino acid chain.) Sequence A…
A: The process by which DNA is copied to RNA is called transcription, and that by which RNA is used to…
Q: sIMILARITIES AND DIFFERENCES ecologist vs. environmentalist
A: Differences between ecologist and environmentalist: I) Ecologists are those who study ecology i.e.…
Q: Identity gene 1 (bl, pr, vg) Identity gene 2 ( bl, pr, vg) Identity gene 3 ( bl,pr, vg) How many map…
A: The three point test cross is used in this table. The greater numbers are parental progenies. The…
Q: 14. Eubacteria will display one of three shapes. These shapes CC
A: Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They…
Q: Consider the graph below. This is an example of whatkind of natural selection? O Directional…
A: Evolution is a steady phenomenon which cause transformation in life from much simple to more…
Q: Give similarities and differences between the following: a. ecologist vs. environmental scientist b.…
A: Ecology is the study of the relationship and interactions of different components of a habitat. The…
Q: Explain why this carbon cycle diagram does not have a b arrow that shows carbon atoms going from co2…
A: Carbon (considered as macronutrients) is one of the most important atom present in all organic…
Q: The results of a scientific inquiry are not shared with other scientists as this may lead to its…
A: Introduction :- The various ways that scientists examine the natural world and offer answers based…
Q: Write a summary: Simply put, a lab report is a way to explain what you have done in an experiment.…
A: "Research" is the process of researching and evaluating many elements of a problem to find a…
Q: properties of the Ach nicotinic receptors, EXCEPT are hexameric macromolecules when open allow the…
A: The "brain" is organized into two types of tissue: grey matter, which is composed of mixed neuronal…
Q: Describe the function of a target cell and explain why it is present in organs. (max 5 points)
A: Cells are the structures of life that together make a tissue. Two or more types of tissues make an…
Q: Consider the graph below. This is an example of whatkind of natural selection? Directional selection…
A: INTRODUCTION Natural selection The nature allows the growth and development of the organisms that…
Q: Haemochromatosis is a recessive disorder caused by mutations in the HFE gene. The disorder can be…
A: Introduction : The DNA sequence varies from organism to organism. The order of the base pairs can…
Q: In the following diagram, what is the correct term for the structures indicated by letter B?…
A: Histone Special group of proteins found in the nuclei of eukaryotic cells responsible for DNA…
Q: Question 6 The genetic code is considered redundant because: It is prone to mutations The same mRNA…
A: Introduction: The creation of a polypeptide by messenger RNA (mRNA) is known as translation. The…
Q: 86 Which of the following is NOT associated with the prokaryotic cell memb is selectively permeable…
A: The membrane which allow the passage of solvent molecules but do not allow the passage of solute…
Q: In the evolution of vascular plants, there is a trend toward the: A above-ground parts becoming…
A: Introduction Aquatic flora characterised the earliest plants. In order to survive in dry…
Q: What makes an experiment controlled?
A: Scientists test their hypotheses using controlled experiments. A hypothesis is an assumption, an…
Q: There is a track athlete running an 800m race. Imagine that this is at sea-level. The temperature is…
A: Our bodies require energy for all activities, which is provided by food oxidation during…
Q: In his infamous, genetic code-cracking experiment, what did Nirenberg use as a source of translation…
A: Since you have asked multiple questions, we will solve the first question for you. If you want ant…
Q: the Highest P... 2019 Summer Inter... Match each of the parts of a eukaryotic (specifically, human)…
A: As per the hierarchy of life, cell is the smallest entity that consists life of its own. It is…
Q: Which of the following is a primary function of the active site of an enzyme? a. It binds…
A: Enzymes are proteins that help speed up metabolism, or the chemical reactions in our bodies. They…
Q: How do cilia and flagella differ?
A: Unlike plants, most of the living animals are motile that is they can travel to different places to…
Q: "In a beaker containing 6% NaCl, you place a cell which contains 0.9% NaCl. NaCl doesn t cross the…
A: Introduction : Osmosis is a passive process and happens without any use of energy. It involves the…
Q: Discuss the effects of isotonic, hypotonic, and hypertonic environments on red blood cells and plant…
A: Osmosis is the net movement of water across a semipermeable membrane.
Q: Codons 24 to 66 represent an intron. At what point in the process of protein synthesis are introns…
A: Transcribing DNA to RNA is the initial step in a long process that finally synthesizes functional…
Q: 4. For each variable note if there is an increase, decrease or if the process stays the same or is…
A: A herbicide's objective is to prevent or destroy the development of weeds. This contributes to…
Q: Parsimony criterion is used to choose the hypothesis of relationships which requires the least…
A: Homology It is the similarity of the structure, physiology, or development of various species of…
Q: How did life likely originate in the planet? Choose ONLY ONE. - Biogeochemical theory - Special…
A: Introduction The natural process through which life has developed from non-living matter, such as…
Q: Among the different fields or disciplines of biochemistry, which do you think is the most applicable…
A: Introduction Biology is a vast topic that can be discussed in depth and it would turn into an essay.…
Q: If you can please fill out the chart
A: Dyes are used to improving the resolution during gel electrophoresis. Nucleic acid staining dyes…
Q: Hoe many organelles does Eukaryote cells have?
A: Ans: Cell is the structural and functional unit of life. And there are millions of cells present in…
Q: 5. Ratios of the bases present in different samples of nucleic acid yielded the following results:…
A: Chargaff's rule states that in a double-stranded DNA or RNA, purines = pyrimidines.
Q: Are viruses living? Discuss based from the properties of life in Biology.
A: Introduction :- A virus is an infectious microorganism made up of a protein-coated segment of…
Q: Use the information in the tables below to determine the most probable number of bacteria per 100 mL…
A: The Most Probable Number (MPN) method, which replicates liquid broth growth in ten-fold dilutions,…
Q: What gene sequences are selected during DNA barcoding?
A: DNA barcoding is a taxonomic technique which identifies at the species level by using a brief…
Q: Joints Shoulder Anthrology of Joints Familiarize yourselves with the different joints of the body…
A:
Q: Use the first two grape to state whether the population size or amount of growth generally…
A: Graphs make a visual presentation of the data. Thus graphs are aesthetically pleasing as well as…
What is the signaling pathway that mediates the organizing activity of the A/P organizer in the Drosophila wing disc? Describe two experiments that suggest this pathway functions to organize pattern and promote growth along the anterior/posterior axis of wing imaginal discs.
Step by step
Solved in 4 steps
- What would be the most likely effect of inhibiting the translation of hunchback mRNA throughout a Drosophila embryo?In flies, the gap gene kruppel is expressed in a broad band in the middle of the embryo with giant expressed as its anterior border and knirps at its posterior border. How is the expression of kruppel limited to this band in the embryo? Describe the spatial regulation of the kruppel gene.You isolate a glp-1 mutation of C. elegans and discover that the DNA region encoding the spatial control region (SCR) has been deleted. What will the GLP-1 protein expression pattern be in a four-cell embryo in mutant heterozygotes? In mutant homozygotes?
- In Drosophila, both fushi tarazu (ftz) and engrailed (eng) genes encode homeobox transcription factors and are capable of eliciting the expression of other genes. Both genes work at about the same time during development and in the same region to specify cell fate in body segments. To discover if ftz regulates the expression of engrailed;if engrailed regulates ftz; or if both are regulated by another gene, you perform a mutant analysis. In ftz embryos (ftz/ ftz) engrailed protein is absent; in engrailed embryos (eng/eng) ftz expression is normal. What does this tell you about the regulation of these two genes—does the engrailed gene regulate ftz, or does the ftz gene regulate engrailed?What is positional information? Discuss three different ways that cells obtain positional information. Which of these three ways do you think is the most important for the formation of a segmented body pattern in Drosophila?The floral homeotic genes of Arabidopsis belong to the MADS-box gene family, while in Drosophila, homeotic genes belong to the homeobox gene family. In both Arabidopsis and Drosophila, members of the Polycomb gene family control expression of these divergent homeotic genes. How do Polycomb genes control expression of two very different sets of homeotic genes?
- Which of the following statement(s) is/are true with regard to positional information in Drosophila? A. Morphogens are a type of molecule that conveys positional information. B. Morphogenetic gradients are established only in the oocyte, prior to fertilization. C. Cell adhesion molecules also provide a way for a cell to obtain positional information.Discuss how the anterior portion of the anteroposterior axis is established in Drosophila. What aspects of oogenesis are critical in establishing this axis? What do you think would happen if the bicoid mRNA was not trapped at the anterior end but instead diffused freely throughout the oocyte?The easily observed external structures in insects, such as different pairs of legs, antennae, and wings form from imaginal discs. a.) How is the identity of the different Drosophila imaginal discs established in the embryo—for example, how is it determined whether a disc will form a wing, a leg, or some other structure? b.) Dominant mutants in the gene Antennapedia result in fore legs forming in the location where antennae are expected. How does this mutant phenotype illustrate your response to Part a?
- The anterior structure of the Drosophila is promoted by which of the following events?* a. nanos proteins block the transcription of the caudal gene. b. caudal proteins promote the transcription of the bicoid gene. c. bicoid proteins promote transcription of the hunchback gene. d. hunchback proteins block the transcription of the caudal gene. The posterior structures of the Drosophila is promoted by which of the following events?* a. caudal proteins block the transcription of the bicoid gene. b. bicoid proteins block transcription of the hunchback gene. c. nanos proteins promote the transcription of the caudal gene. d. hunchback proteins promote the transcription of the caudal gene.a. The eyeless gene is required for eye formation in Drosophila. It encodes a homeodomain. What would you predict about the biochemical function of the Eyeless protein?b. Where would you predict that the eyeless gene is expressed in development? How would you test your prediction? c. The Small eye and Aniridia genes of mice and humans, respectively, encode proteins with very strong sequence similarity to the fly Eyeless protein, and they are named for their effects on eye development. Devise one test to examine whether the mouse and human genes are functionally equivalent to the fly eyeless gene.You isolate a glp-1 mutation of C. elegans and discoverthat the DNA region encoding the spatial control region(SCR) has been deleted. What will the GLP-1 protein expression pattern be in a four-cell embryo in mutant heterozygotes? In mutant homozygotes?