The activity of RNA polymerase II is inhibited by Actinomycin D. When actinomycin D is present, early development in many vertebrate species, for example frogs, can begin after the formation of a blastula (hollow ball of cells that forms after early cleavage divisions), but development stops before gastrulation. Question asked to discuss the activity of maternal gene in contrast to activity of zygotic gene in early frog development. Introduction: Drosophila is the model organism of study of development. It is a well studied genome sequence. Multiple genes are involved in the development of drosophila. The gene that directs the development and fate of an organism are known as developmental genes. Bicoid and Nanos are maternal effect genes; the egg receives these from the mother. Bicoid and Nanos play an important role in creating the anterior to posterior axis. The genes are activated in the fertilized egg (Zygote). In contrast to maternal effect genes, these genes are transcribed by zygotic DNA.

Question

Want to see the full answer?

Answer 1

Question

Chapter 18, Problem 9P

Summary Introduction

To analyze:

The activity of RNA polymerase II is inhibited by Actinomycin D. When actinomycin D is present, early development in many vertebrate species, for example frogs, can begin after the formation of a blastula (hollow ball of cells that forms after early cleavage divisions), but development stops before gastrulation. Question asked to discuss the activity of maternal gene in contrast to activity of zygotic gene in early frog development.

Introduction:

Drosophila is the model organism of study of development. It is a well studied genome sequence. Multiple genes are involved in the development of drosophila. The gene that directs the development and fate of an organism are known as developmental genes. Bicoid and Nanos are maternal effect genes; the egg receives these from the mother. Bicoid and Nanos play an important role in creating the anterior to posterior axis. The genes are activated in the fertilized egg (Zygote). In contrast to maternal effect genes, these genes are transcribed by zygotic DNA.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

6. The mammalian phylogenies (labeled a and b) were produced by two different research groups. a. In which tree do phylogenetic relationships most closely align with biogeography and why? (consult the Teeling and Hedges paper) b. What are the most closely related species to Chiroptera in each tree? Might the use of convergent traits for building phylogenies explain this difference? If so, which tree is most likely to have relied on convergent traits and why? c. What are some possible reasons that the two research groups came up with different phylogenies (in general terms)? describe at least three possible reasons.

Build a model of a prokaryotic cell using any material of your choice. In your model be sure to include all the structures appropriate to your cell. You may model a bacterial cell or an archaea. You will model at least 4 structures in any model. Next, build a model of a virus using the same type of materials. You may choose any type of virus but be sure you can illustrate the key features of a virus (head shape for example). Once complete, take multiple photographs of your models from all angles. Include these images in a document that also contains the following completed table format. You may need to add rows to your table depending on the type of prokaryote you model. Structure Model Key Found in Different in Function Virus Virus Once your model is complete, write a brief description of your cell and your virus. Emphasize features that are absent in viruses that classify them as non-living. You can refer to specific structures in your table in this explanation. Some suggestions for…

(This is a 2-part work, Part 1 is done, only Part 2 is to be worked on at the bottom)Part 1 (Done): Describe the levels of structural hierarchy for the human body, starting with the organismal level and ending with the chemical level. In addition, you should make sure you link each level to the previous level, emphasizing the structural relationships. The human body is organized into a structural hierarchy that progresses from the macroscopic organismal level down to the microscopic chemical level. Each level builds upon the previous one, creating increasingly complex structures. Below is the hierarchy, from largest to smallest, with explanations linking each level to its predecessor: 1. Organismal Level The entire living human body.Relationship: All lower levels work together to sustain life at this highest level. 2. Organ System Level Groups of organs working together to perform major functions.Examples: circulatory, nervous, digestive systems.Relationship: The organismal…