In Flower Beetles, Pygmy (Py)is Recessive to Normal Size (Py⁺)

question 51

Multiple Choice

In flower beetles, pygmy (py) is recessive to normal size (py⁺) , and red color (r) is recessive to brown (r⁺) .A beetle heterozygous for these characteristics was test crossed to a beetle homozygous for pygmy and red.The following are progeny phenotypes from this testcross: Carry out a series of chi-square tests to determine if there is equal segregation of alleles at the py locus.What is the CORRECT chi-square value and how many degree(s) of freedom should be used in its interpretation?

• A)0)16 with one degree of freedom
• B)0)16 with three degrees of freedom
• C)0)48 with one degree of freedom
• D)0)48 with two degrees of freedom
• E)4)56 with one degree of freedom

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Definitions:

Aposematic Coloration

The conspicuous coloring of a poisonous or distasteful organism that enables potential predators to easily see and recognize it. Also called warning coloration. Compare with cryptic coloration.

Habituation

A simple form of learning where an organism eventually stops responding to a stimulus after repeated exposures, without any reward or punishment.

Worker Bees

Female bees that are not queens and perform all the work tasks necessary for colony survival.

Male

Referring to the sex that produces small, mobile gametes (sperm) in sexually reproducing species, typically associated with XY chromosome configuration in mammals.