A Mixed Infection of an E

question 13

Essay

A mixed infection of an E.coli strain was performed using the h^-r⁺ and h⁺r^- genotypes of the T2 phage.Progeny phage were collected after lysis and plated on two E.coli strains to obtain plaque characters important for detection of parental and recombinant types.
h⁺ can only infect one strain of E.coli
h^- can infect both strains
r⁺ shows slower lysis,forms small plaques
r^- shows rapid lysis
In the table below,for each observed phenotype,give the genotype that would produce that phenotype,and indicate if the phenotype is parental or recombinant type.Calculate the map distance between the h and r genes using the information provided.
$$\begin{array} { | l | l | l | l | } \hline \text { Plaque phenotype } & \text { Number of plaques } & \text { Plaque genotype } & \text { Parental/recombinant } \\\hline \text { cloudy, large } & 600 & & \\\hline \text { clear, small } & 480 & & \\\hline \text { cloudy, small } & 180 & & \\\hline \text { clear, large } & 180 & & \\\hline\end{array}$$

Understand the basic principles of debits and credits in accounting.

Identify which accounts are increased by debits and which by credits.

Familiarize with the correct abbreviations and terminology used in accounting.

Apply the rules of debits and credits to specific transactions.

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Definitions:

Myopia

A common vision condition also known as nearsightedness, where distant objects appear blurry while close ones are seen clearly.

Presbyopia

A state related to older age where the eye gradually loses its capacity to concentrate on objects that are close.

Cataracts

An eye condition characterized by the clouding of the lens, leading to a decrease in vision which can develop slowly and affect one or both eyes.

Macular Degeneration

A progressive disease that usually affects people older than the age of 50. It occurs when the retina no longer receives an adequate blood supply.