Histidine strains of neurospora

Assignment Help Biology
Reference no: EM131422770

The histidine locus is complex in Neurospora crassa. Many multiple alleles are known, such as 245, CD-16, 430, and 261, which lack the ability to synthesize the amino acid histidine. Such strains will consequently be unable to grow on minimal medium. Provide an interpretation for the following observations involving these histidine strains of Neurospora.

a) When heterokaryons are produced (single "cells" containing nuclei from two different strains), the combination of strains 245 and 261 always produces growth on minimal medium, whereas the combination of strains CD-16 and 245 never produces growth on minimal medium.

b) When strain 430 is crossed with strain 261, rare ascospores are produced, which one can grow on minimal medium.

Separate and clearly label your answers for parts a-b in the box below.

Reference no: EM131422770

Questions Cloud

Factors that affect plant growth are soil health : Three factors that affect plant growth are soil health, nitrogen fixation, and sunlight. Explain how each factor works to effect the growth of plants.
Write a paper about saudi vision : Write a paper about Saudi Vision 2030. Write minimum 500 words for each subject, and use minimum 3 references for each above subject.
Effects suggest about successional patterns : What do assembly rules and priority effects suggest about successional patterns and the composition of forests in rural (relatively undisturbed) and urban (relatively disturbed) habitats?
Draw a graph of the density curve : What is the height of the density curve between 0 and 2? Draw a graph of the density curve.- Use your graph from (a) and the fact that probability is area under the curve to find P(Y ≤ 1.6).
Histidine strains of neurospora : The histidine locus is complex in Neurospora crassa. Many multiple alleles are known, such as 245, CD-16, 430, and 261, which lack the ability to synthesize the amino acid histidine. Such strains will consequently be unable to grow on minimal medi..
Explain some information that consumers will want to know : Call the store manager and request an on-site interview, with cameras. Explain that you have some information that consumers will want to know about and give the store a chance to show its side of the story.
Discuss the impact of the disorder on the family : Discuss the diathesis-stress model as it pertains to schizophrenia.Explain the causal factors associated with the disorder.Evaluate psychosocial and cultural factors.Discuss the impact of the disorder on the family.
What is the probability that y is less than 1 : What is the probability that Y is less than 1? Sketch the density curve, shade the area that represents the probability, then find that area. Do this for (c) also.
Modern human ability to engage in athletic activities : The odd combination of suspensory upper bodies and bipedal lower bodies influences modern human ability to engage in athletic activities.

Reviews

Write a Review

Biology Questions & Answers

  Show the genotypes of the parents

In fruit flies, the recessive v allele results in vermilion (bright red) eyes; the wild type v+ allele results in red eyes. The dominant p+ allele of a second gene is required to produce pigment; the recessive p allele results in white eyes.

  Definition of cell membrane

I need textbook definition of cell membrane and a in my own wordsdefiniton. I need an anology of the word cell membrane. and what its like in real life. and tell me the picture i can drawof the thing in real life.

  Description of the producers and consumers

A description of the producers and consumers (you do not need to list every organism, but give a few examples along with what makes an organism fall into one class or the other)

  Describe the structure and function of the alveoli

Describe the structure and function of the alveoli. If the muscles used were live, not glycerinated, what would you predict would be the result of adding ATP + Mg to the outside of the muscle cells?

  Volume and breathing rate affected by body position

Suppose if the demands for O2 and CO2 are the same in either body position, should tidal volume and breathing rate be affected by body position?

  Why are the protists a paraphyletic group

Why are the protists a paraphyletic group, and what would need to change for them to be a monophyletic group?

  Explain the phases of hemostasis

Describe in detail the three phases of hemostasis. How could a lack of a vitamin K injection at birth lead to increased bruising and hemorrhage?

  What would be the most likely function of such zinc ions

Zinc, an essential trace element, may be found bound to the active site of some enzymes. What would be the most likely function of such zinc ions?

  What is the enzyme

What must the intracellular 3-phosphoglycerate/1, 3-diphosphoglycerate ratio be to make the phosphoglycerate kinase reaction thermodynamically favourable in the direction of 1, 3-diphosphoglycerate synthesis.

  Why is it necessary to complete a series of biological test

Why is it necessary to complete a series of biological, chemical, and physical test on your soil sample? Explain the purpose the tests conducted at each station....texture, temperature, pH, nutrient testing, & presence of macroinvertebrate..

  Describe an example of these hormones and their function

How do second messengers effect changes inside of cells?

  What is the pathophysiology of this diagnosis

if someone is diagnosed with diabetes mellitus, what can a healthcare worker tell a patient about the anatomy and physiology of the related system? What is the pathophysiology of this diagnosis?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd