In Soreflies (A Hypothetical Insect), the Dominant Allele, L, Is

question 22

Multiple Choice

In soreflies (a hypothetical insect) , the dominant allele, L, is responsible for resistance to a common insecticide called Loritol. Another dominant allele, M, is responsible for the ability of soreflies to sing like birds. A true-breeding mute, Loritol-resistant sorefly, was mated to a true-breeding singing, Loritol-sensitive sorefly, and the singing, Loritol-resistant female progeny were testcrossed with true-breeding wild-type (i.e., mute, Loritol-sensitive) males. Of the 400 total progeny produced, 117 were mute and Loritol-resistant, 114 could sing and were Loritol-sensitive, 83 could sing and were Loritol-resistant, and 86 were mute and Loritol-sensitive. A chi-square test is done to determine if there is equal segregation of alleles at the L locus. What will be the chi-square value obtained and how many degrees of freedom would be used to interpret this value?

• A) 0.09 and one degree of freedom
• B) 0.56 and two degrees of freedom
• C) 0 and one degree of freedom
• D) 9.72 and four degrees of freedom
• E) A chi-square test is not the appropriate statistical test to answer this question.

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