What is a homeotic mutant and what do homeotic genes do

Assignment Help Biology

Reference no: EM13340510

1. You microinject "BICOID" mutant (null) eggs at the (1)Anterior end (2) posterior end and (3) center with "BICOID mRNA". For each case (1,2,and 3) predict (A) mRNA localization of the maternal-effect genes immediately after injection (B) the protein localization of the maternal-effect genes a few hours after the injection (C) the pattern of gap gene expression at cellularization and (D) the presumptive body plan of the embryo at cellularization. Explain your logic at each step.

2. "Runt" is a primary pair-rule gene that represses and is repressed by fushi tarazu.

(A) Assume "RUNT" stripe 4 is regulated by Kruppel, caudal, and giant. Draw a (hypothethical) "RUNT" stripe 4 enhancer, and show on a drawing of a gap gene-expressing embryo where that stripe of "runt" would be expressed and why.

(B) Every other segment will fail to form in a runt mutant embryo: explain why

3. Your great-uncle has spent his life studying the Madagascan Frilled Pilibug.

1098_What is a homeotic mutant.png

Over the years he has collected several mutant strains for the Zoo. When he heard you were taking developmental biology, he shipped you a box containing several of these mutants and ask for your help in analyzing them. One of the mutants (fancy) has an extra frill on the back of the head, located just behind the one all Frilled Pillbugs have. One mutant (shorty) has a much shorter abdomen than wildtype bugs and is missing the back pair of legs and one mutant (clown) has no legs and a frill that goes all the way around.

Assuming Madagascan Frilled Pil!bugs have axis specification mechanisms similar to Drosophila, speculate as to what class of gene is mutated in each bug, and explain why that class of mutation would lead to that phenotype.

4. What is a homeotic mutant? What do homeotic genes do? Explain why homeosis occurs in a homeotic mutant. Use an example from animals and an example from plants to discuss the similarities and differences between homeotic mutants/genes in plants and animals.

Reference no: EM13340510

Questions Cloud

Discuss the concept of satisficing : Discuss the concept of satisficing. In your answer, discuss the positive and negative aspects of applying satisficing in decision-making.

What is this year expected net profit : What sales price per unit will be necessary this year if management wishes to maintain the same profit to sales ratio as last year?

General capital assets : General Capital Assets. Make all necessary entries in the appropriate governmental fund general journal and the government-wide governmental activities

Identify three contributors to development of biopsychology : Identify three contributors to the development of biopsychology. Describe the ideas and/or research that the person is famous for. Discuss the reasons that their contributions are important to the field of contemporary biopsychology.

What is a homeotic mutant and what do homeotic genes do : What is a homeotic mutant and what do homeotic genes do - Explain why homeosis occurs in a homeotic mutant.

Neurodevelopmental-genetic-neurotransmitter : Describe two types of biological/brain evidence (neurodevelopmental, genetic, neurotransmitter, imaging) for (a) schizophrenia and (b) depression. Describe evidence for different biological treatments that are useful for (a) schizophrenia and (b) dep..

Calculate the work done by the gas : 10.0 moles of an ideal gas, at an initial pressure of 1.50 x105 N/m2 and an initial volume of 1.300 m3, Find the work done by the gas

How many units of each product must be sold : What sales price per unit will be necessary this year if management wishes to maintain the same profit to sales ratio as last year?

Compute the potential difference across the resistor : An inductor L = 0.0470 H and a 35.0 ? resistor are connected in series to a 3.70 volt battery and a switch. What is the potential difference across the resistor immediately after the switch is closed

User Account

All Pages