The achoo syndrome (sneezing in response to bright light) and trembling chin (triggered by anxiety) are both dominant traits in humans. a. What is the probability that the first child of parents who are heterozygous for both the achoo gene and trembling chin will have achoo syndrome but lack the trembling chin? b. What is the probability that the first child will not have achoo syndrome or trembling chin?

What type of speed does the v in the formula v = d/t represent?

What would have been the outcome (the genotypic and phenotypic ratios) in the $\mathrm{F}_2$ of Mendel's dihybrid cross shown in Fig. 2.15 if the alleles of the pea color gene $(Y, y)$ and the pea shape gene $(R, r)$ did not assort independently, and instead the alleles inherited from a parent always stayed together as a unit?

Use the Laws of Logarithms to evaluate the expression. $\log _{5} \frac{1}{\sqrt{125}}$

How many genetically different eggs could be formed by women with the following genotypes? a. Aa bb CC DD b. AA Bb Cc dd c. Aa Bb cc Dd d. Aa Bb Cc Dd

An organlle capable of synthesis of nuclear membrane is the _____.

The self-fertilization of an $F_1$ pea plant produced from a parent plant homozygous for yellow and wrinkled seeds and a parent homozygous for green and round seeds resulted in a pod containing seven $F_2$ peas. (Yellow and round are dominant.) What is the probability that all seven peas in the pod are yellow and round?

A third-grader decided to breed guinea pigs for her school science project. She went to a pet store and bought a male with smooth black fur and a female with rough white fur. She wanted to study the inheritance of those features and was sorry to see that the first litter of eight contained only rough black animals. To her disappointment, the second litter from those same parents contained seven rough black animals. Soon the first litter had begun to produce $F_2$ offspring, and they showed a variety of coat types. Before long, the child had 125 $F_2$ guinea pigs. Eight of them had smooth white coats, 25 had smooth black coats, 23 were rough and white, and 69 were rough and black. a. How are the coat color and texture characteristics inherited? What evidence supports your conclusions? b. What phenotypes and proportions of offspring should the girl expect if she mates one of the smooth white $F_2$ females to an $F_1$ male?

Locate any intercepts.

$$f(x)=\left\{\begin{array}{ll}{-2 x+3} & {\text { if } x<1} \\ {3 x-2} & {\text { if } x \geq 1}\end{array}\right.$$

Choose the best answer.

What possibly influenced the evolution of bipedalism?

a. Humans wanted to stand erect in order to use tools.

b. With bipedalism, it's possible to reach food overhead.

c. With bipedalism, sexual intercourse is facilitated.

d. An upright stance exposes more of the body to the Sun, and vitamin D production requires sunlight.

e. All of these are correct.

Galactosemia is a recessive human disease that is treatable by restricting lactose and glucose in the diet. Susan Smithers and her husband are both heterozygous for the galactosemia gene. a. Susan is pregnant with twins. If she has fraternal (nonidentical) twins, what is the probability both of the twins will be girls who have galactosemia? b. If the twins are identical, what is the probability that both will be girls and have galactosemia? For parts c–g, assume that none of the children is a twin. c. If Susan and her husband have four children, what is the probability that none of the four will have galactosemia? d. If the couple has four children, what is the probability that at least one child will have galactosemia? e. If the couple has four children, what is the probability that the first two will have galactosemia and the second two will not? f. If the couple has three children, what is the probability that two of the children will have galactosemia and one will not, regardless of order? g. If the couple has four children with galactosemia, what is the probability that their next child will have galactosemia?

Imagine that you are a genetic counselor, and a couple planning to start a family comes to you for information. Charles was married once before, and he and his first wife had a child with cystic fibrosis. The brother of his current wife, Elaine, died of cystic fibrosis. What is the probability that Charles and Elaine will have a baby with cystic fibrosis? (Neither Charles, Elaine, nor their parents have cystic fibrosis.)

Among native Americans, two types of earwax (cerumen) are seen, dry and sticky. A geneticist studied the inheritance of this trait by observing the types of offspring produced by different kinds of matings. He observed the following numbers:

$$\begin{matrix} \text{ } & \text{ } & \text{ Offspring} & \text{ }\\ \text{Parents} & \text{Number of mating pairs} & \text{Sticky} & \text{Dry}\\ \hline \text{Sticky $\times$ sticky} & \text{10} & \text{32} & \text{6}\\ \text{Sticky $\times \mathrm{dry}$} & \text{8} & \text{21} & \text{9}\\ \text{Dry $\times \mathrm{dry}$} & \text{12} & \text{0} & \text{42}\\ \end{matrix}$$

a. How is earwax type inherited? b. Why are there no 3:1 or 1:1 ratios in the data shown in the chart?

In humans, a dimple in the chin is a dominant characteristic. a. A man who does not have a chin dimple has children with a woman with a chin dimple whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? b. A man with a chin dimple and a woman who lacks the dimple produce a child who lacks a dimple. What is the man’s genotype? c. A man with a chin dimple and a nondimpled woman produce eight children, all having the chin dimple. Can you be certain of the man’s genotype? Why or why not? What genotype is more likely, and why?