First Experiment

1		In this experiment, the use of genetic markers enabled the researchers to determine
			A)	The function of the genes conferring DDT resistance
			B)	Which chromosomes were inherited from the DDT-resistant or DDT-sensitive strain
			C)	The total number of genes conferring DDT resistance
			D)	None of the above
2		In the study of a quantitative trait, what is the purpose of a backcross?
			A)	To generate offspring with different combinations of chromosomes from two parental strains.
			B)	To further select for the quantitative trait
			C)	To create hybrids that exhibit overdominance
			D)	To eliminate deleterious alleles from the population
3		In this experiment, the level of DDT resistance (based on survival) was presumed to be a measure of
			A)	The ability of flies to produce new mutations
			B)	The random fluctuation of DDT resistance among genetically identical individuals
			C)	The relative number of DDT-resistance alleles that a particular fly might carry
			D)	The ability of natural selection to cause DDT resistance
4		Based on the data, alleles conferring DDT resistance are found on which chromosomes?
			A)	X
			B)	2
			C)	3
			D)	All of the above
5		According to the data, a comparison of which F2 offspring suggests that chromosome 2 carries DDT-resistance alleles?
			A)	10 and 13
			B)	10 and 11
			C)	14 and 16
			D)	A and C
6		If there hadn't been any DDT-resistance alleles on chromosome 3, we would have expected the same level of DDT resistance when comparing which pairs of F2 offspring?
			A)	13 and 16
			B)	12 and 14
			C)	11 and 14
			D)	2 and 3

Second Experiment

7		In this experiment, a quantitative trait is measured by
			A)	The bands in a DNA fingerprint
			B)	The number of ridges in fingerprints
			C)	The sizes of fingerprints
			D)	None of the above
8		The observed correlation coefficient is calculated by
			A)	Using ridge count data among pairs of individuals
			B)	Knowing the genetic relationships among pairs of individuals
			C)	A and B
			D)	None of the above
9		The expected correlation is based on
			A)	Ridge count data
			B)	Ridge count data of genetically related pairs
			C)	Known genetic relationships
			D)	None of the above
10		The expected correlation coefficient for a parent/child pair is
			A)	0.125
			B)	0.25
			C)	0.5
			D)	1.0
11		If the heritability of ridge counts had been around 0.5 (instead of approximately 1.0), the observed correlation coefficient for fraternal twins would have been approximately
			A)	0.125
			B)	0.25
			C)	0.5
			D)	1.0