In a Cross Between an Arginine-Requiring,acetate-Requiring Strain of Neurospora and a Wild-Type

question 33

Essay

In a cross between an arginine-requiring,acetate-requiring strain of Neurospora and a wild-type strain (arg ac * + +)the following ordered tetrads of asci were found,with the numbers of each type indicated below the particular tetrad:


a)Calculate the map distance between arg and its centromere.
b)Calculate the map distance between ac and its centromere.
c)What is the most likely map of the two genes in relation to each other and to the position of their respective centromere(s)?

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Definitions:

Ayrton

Refers to Hertha Ayrton, a British engineer, mathematician, physicist, and inventor, known for her work on electric arcs and ripples in sand and water.

D'Arsonval

Refers to a type of galvanometer used for detecting and measuring small electric currents by the mechanical movement it produces through a magnetic field.

D'Arsonval Meter

A type of ammeter, based on the D'Arsonval galvanometer, used to measure electric current with a moving coil in a magnetic field.

Moving Coil

A type of electromagnetic actuator where a coil within a magnetic field moves when current flows through it, commonly found in loudspeakers and galvanometers.