Answered: Progeny resulting from crosses of…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter9: Patterns Of Inheritance

Section: Chapter Questions

Problem 11SQ

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Question

In the early 1900s, Lucien Cuénot studied the genetic basis of yellow coat color in mice (). He carried out a number of crosses between two yellow mice and obtained what he thought was a 3 : 1 ratio of yellow to gray mice in the progeny. The following table gives Cuénot’s actual results, along with the results of a much larger series of crosses carried out by Castle and Little (W. E. Castle and C. C. Little. 1910. Science 32:868–870).

Q.Using a chi-square test, determine whether Cuénot’s results are significantly different from the 3 : 1 ratio that he thought he observed. Are they different from a 2 : 1 ratio?

Progeny resulting from crosses of yellow x yellow mice
Yellow Non-yellow
Investigators
progeny
progeny
pi
Cuénot
263
100
Castle and
800
435
Little
Both
1063
535
combined

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