Mel’s Diner is losing profit because of the increased cost of food. They don’t want to upset their customers by increasing prices. Instead, they want their customers to feel like they’re getting the same portions while they decrease their food costs. According to the Delboeuf illusion, which of the following strategies should the diner follow?       

Which of the following changes in chromosome structure does not alter the total amount of genetic material?

Parental cross: CCdd X ccDD.   These two genes are on the same chromosome.  The F1 generation is then crossed to ccdd individuals.  Which of the offspring are recombinant–they can only be produced by crossing over in the F1 parent—? P:  CCdd X ccDD   Results in the  F1:  CcDd CcDd X ccdd  Results in offspring:                  

In a two factor test cross you calculated that two genes were 60 map units apart. This is most likely an underestimate of the actual distance due to:

Female fruit flies homozygous for the X-linked white-eye allele (XWXW) are crossed to males with red eyes (XW+Y). On rare occasions, an offspring is a male with red eyes. This rare offspring is most likely ( _______) due to non-disjunction during (                  ). 

In fruit flies, straight wings (S) is dominant to curved wings (s). Recently, you have discovered a new gene in flies that exists in two alleles. The allele designated L causes large heads and the l allele causes small heads. These genes are autosomal and follow a Mendelian pattern of inheritance. You begin with two true-breeding strains, straight wings with small heads and the other curved wings with large heads. All of the F1 offspring have straight wings with large heads. You then cross the F1 offspring to flies with curved wings and small heads and obtain the following results. 187 Straight wings, small heads   60 Curved wings, small heads 197 Curved wings, large heads   56 Straight wings, large heads 500 Total F2 offspring Note:     TABLE 2.1 Chi Square Values and Probability   Degrees of Freedom   P ∙ 0.99   0.95   0.80   0.50   0.20 Null Hypothesis Rejected 0.05           0.01 1 0.000157 0.00393 0.0642 0.455 1.642 3.841 6.635 2 0.020 0.103 0.446 1.386 3.219 5.991 9.210 3 0.115 0.352 1.005 2.366 4.642 7.815 11.345 4 0.297 0.711 1.649 3.357 5.989 9.488 13.277       To conduct a chi square analysis to determine if these two genes are linked, what is your hypothesis?

Match the correct definition to its term

Indicate which aqueous solution has the slowest evaporation rate.

The vapor pressure of an aqueous solution is found to be 24.9 mm Hg at 25°C. What is the composition of the solution (in terms of mole fraction of solute)? The vapor pressure of water is 25.756 mm Hg at 25°C.

The vapor pressure of a substance in solution depends only on