Drosophila females homozygous for the third chromosomal genes pink and ebony (the same genes from Problem 16) were crossed with males homozygous for the second chromosomal gene dumpy. Because these genes are recessive, all offspring were wild-type (normal). F1 females were test crossed to triply recessive males. If we assume that the two linked genes, pink and ebony, are 20 mu apart, predict the results of this cross. If the reciprocal cross were made (F1 males—where no crossing over occurs—with triply recessive females), how would the results vary, if at all?

The edge of a cube is measured as 10 cm with an error of 1%. The cube's volume is to be calculated from this measurement. Estimate the percentage error in the volume calculation.

An organism is described as R1; with red coloring. Rr is the organism's $\rule{1.5cm}{0.4pt}$, while red color is its $\rule{1.5cm}{0.4pt}$. This organism would be $\rule{1.5cm}{0.4pt}$ (homozygous/heterozygous) for this color gene.

Match the most related term with the description: Gene’s position on a chromosome

a. genotype

b. heterozygous

c. locus

d. autosomes

e. simple inheritance

f. homozygous

g. alleles

h. polygenic inheritance

i. homologous

j. genetics

k. karyotype

l. phenotype

In which phase of mitosis does the cytoplasm divide?

In given of the following sentence, cross out the error in the use of formal, standard English. Above the error, write the correct usage.
Is dinner already?

You have dimples, and you would like to know whether you are homozygous or heterozygous for this trait. You have six brothers and sisters. By observing your siblings, how could you tell, with some degree of certainty, that you are a heterozygote?

A woman is homozygous for A-negative blood type. A man has AB-negative blood type. What is the probability that the couple's child will be type B-negative? (A) 0% (B) 25% (C) 50% (D) 75% (E) 100%

Suppose that in measuring the length, width, and height of a box, there is a maximum 1% error in each measurement. Estimate the maximum error in calculating the volume of the box.

Determine the reasonableness of the estimate. If it is not reasonable, state what error was made.

What happens during the $G_1$ phase?

To see why a common student error is indeed an error. Describe briefly how combining like words and combining like radicals are comparable.

In Drosophila, the recessive allele mb of one gene causes missing bristles, the recessive allele e of a second gene causes ebony body color, and the recessive allele k of a third gene causes kidney-shaped eyes. (Dominant wild-type alleles of all three genes are indicated with a + superscript.) The three different P generation crosses in the table that follows were conducted, and then the resultant $F_1$ females from each cross were testcrossed to males that were homozygous for the recessive alleles of both genes in question. The phenotypes of the testcross offspring are tabulated as follows. Determine the best genetic map explaining all the data.

$$\begin{array}{lll} \text{Parental cross} & \text{Testcross offspring of $F_1$ females} & \text{ }\\ \hline \text{$m b^{+} m b^{+}, e^{+} e^{+} \times$} & \text{normal bristles, normal body} & \text{117}\\ \text{$m b\ m b,\ e\ e$} & \text{normal bristles, ebony body} & \text{11}\\ \text{ } & \text{missing bristles, normal body} & \text{15}\\ \text{ } & \text{missing bristles, ebony body} & \text{107}\\ \hline \text{$k^{+} k^{+}, e\ e \times k\ k, e^{+} e^{+}$} & \text{normal eyes, normal body} & \text{11}\\ \text{ } & \text{normal eyes, ebony body} & \text{150}\\ \text{ } & \text{kidney eyes, normal body} & \text{144}\\ \text{ } & \text{kidney eyes, ebony body} & \text{7}\\ \hline \text{$m b^{+} m b^{+}, k^{+} k^{+} \times$} & \text{normal bristles, normal eyes} & \text{203}\\ \text{$m b\ m b,\ k\ k$} & \text{normal bristles, kidney eyes} & \text{11}\\ \text{ } & \text{missing bristles, normal eyes} & \text{15}\\ \text{ } & \text{missing bristles, kidney eyes} & \text{193}\\ \hline \end{array}$$

Predict: For plant stem length, the dominant allele for height is $T$ and the recessive allele is $t$. What would be the genotypes, phenotypes, and offspring probabilities of a cross between a heterozygous parent for tall stem length and one that was homozygous recessive for short stem length?