Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

A strain of Aspergillus was subjected to the mutagenesis by X rays, and two tryptophan-requiring mutants (A and B) were isolated. These tryptophan-requiring strains were plated in huge numbers to obtain revertants to wild type. You failed to recover any revertants from mutants A and recovered one revertant from mutant B. This revertant was crossed with a normal wild-type strain. What proportion of the progeny from this cross would be wild type if:

a) The reversion accurately reversed the original change that produced the typ- mutant allele?

b) The revertant phenotype was generated by a mutation in a second gene located on a dissimilar chromosome (the new mutation suppresses trp-)?

Suggest a description of why no revertants from mutant A were recovered.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M937701

Have any Question? 


Related Questions in Biology

John has difficulty swallowing loss of taste sensation in

John has difficulty swallowing, loss of taste sensation in the posterior one-third of the right half of his tongue, and decreased salivation, especially on the right side. Describe the sensory portion of the affected neu ...

Discussion topicheart diseasenbspis the leading cause of

Discussion Topic Heart disease  is the leading cause of death in the United States. Almost 700,000 people die of heart disease in the U.S. each year. Heart disease is a term that includes several more specific heart cond ...

What is formed by enlargement and rounding off of terminal

What is formed by enlargement and rounding off of terminal cells of a hypha?

Digestion is an important process in the human bodya

Digestion is an important process in the human body. a) Identify and describe the digestive processes. b) Consider the mouth, stomach, small intestines and large intestines - identify the digestive enzymes that are prese ...

What is produced by fragmentation of the hyphae into their

What is produced by fragmentation of the hyphae into their component cells?

Describe the performance of a urinalysis including

Describe the performance of a urinalysis, including equipment.

1 what is the relationship between the structure of a blood

1. What is the relationship between the structure of a blood vessel and blood pressure? 2. What is the relationship between the structure of a blood vessel and blood velocity? 3. Describe the pathway of urine from produc ...

Compare the composition of intracellular and extracellular

Compare the composition of intracellular and extracellular fluids.

Elaborate on the basic concepts involved in the regulation

Elaborate on the basic concepts involved in the regulation of fluids and electrolytes. Also, identify the hormones that play important roles in regulating fluid balance and electrolyte balance and describe their effects.

Assignmentcreate an outline of your assignmentinclude an

Assignment Create an outline of your assignment. Include an introduction and conclusion to tie the paper together. ***Complete the Comprehensive Older Person Evaluation on a non-family member over the age of 70, Also com ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen