Question 1 of 6 You\'re examining resting heart rate among families in Sao Paulo

Question

Question 1 of 6

You're examining resting heart rate among families in Sao Paulo, and observe the pattern in the figure below. Which of the following is most likely to be true from what you're presented?

A. More than half of the variance in resting heart rate among these families in Sao Paulo is genetic

B. More than half of the variance in resting heart rate among these families in Sao Paulo is environmental

C. Resting heart rate variation is affected by allelic variation in at least 6 genes

D. The F1 phenotypic variation is purely genetic

Question 2 of 6

You are calculating the heritability of fastest sprint speed in horses. You have two pure-breeding, homozygous horse breeds (Arabian and Azteca). You cross these horses. In the F1 generation, the variance in sprint speed is 850. In the F2 generation, the variance in sprint speed is 1000. What is the heritability of sprint speed in these horses?

A. 0.15

B. 0.30

C. 0.70

D. 0.85

E. 1.00

Question 3 of 6

A. 0.25

B. 0.45

C. 0.50

D. 0.75

E. 0.90

Question 4 of 6

A. The gardener is correct

B. The gardener is incorrect-- he's imposing directional selection

C. The gardener is incorrect-- he's imposing stabilizing selection

D. The gardener is incorrect-- he's imposing disruptive selection

Question 5 of 6

A. The amount of genetic variance in the trait

B. The amount of environmental variance in the trait

C. The number of genes contributing to the trait

D. None of the above

Question 6 of 6

A. 4.4 feet

B. 4.6 feet

C. 5.28 feet

D. 5.6 feet

E. 6.4 feet

Question 1 of 6

You're examining resting heart rate among families in Sao Paulo, and observe the pattern in the figure below. Which of the following is most likely to be true from what you're presented?

A. More than half of the variance in resting heart rate among these families in Sao Paulo is genetic

B. More than half of the variance in resting heart rate among these families in Sao Paulo is environmental

C. Resting heart rate variation is affected by allelic variation in at least 6 genes

D. The F1 phenotypic variation is purely genetic

Reset Selection

Question 2 of 6

You are calculating the heritability of fastest sprint speed in horses. You have two pure-breeding, homozygous horse breeds (Arabian and Azteca). You cross these horses. In the F1 generation, the variance in sprint speed is 850. In the F2 generation, the variance in sprint speed is 1000. What is the heritability of sprint speed in these horses?

A. 0.15

B. 0.30

C. 0.70

D. 0.85

E. 1.00

Reset Selection

Question 3 of 6

You are selecting for taller corn plants. Your starting population of corn has a mean height of 4 feet. You select plants having 6 foot stalks. The offspring of these corn grow to a height of 5.5 feet. What is the heritability of corn height in this example?

A. 0.25

B. 0.45

C. 0.50

D. 0.75

E. 0.90

Reset Selection

Question 4 of 6

You're talking with a gardener about their tomato plants. The gardener is picking particular characteristics for his tomatoes, favoring plants with fruits that are intermediate in how juicy they are, and planting their seeds. When you tell him that he's imposing "selection" on his garden, he denies it, and points out that there's no change in the mean water-content of his tomatoes over generations. Assess this gardener's response.

A. The gardener is correct

B. The gardener is incorrect-- he's imposing directional selection

C. The gardener is incorrect-- he's imposing stabilizing selection

D. The gardener is incorrect-- he's imposing disruptive selection

Reset Selection

Question 5 of 6

By itself, the total amount of phenotypic variance in a trait (like blood pressure) necessarily tells you:

A. The amount of genetic variance in the trait

B. The amount of environmental variance in the trait

C. The number of genes contributing to the trait

D. None of the above

Reset Selection

Question 6 of 6

You are selecting for taller corn plants. Your starting population of corn has a mean height of 4 feet. You select for 6 foot stalks. The heritability of corn height in your population has already been determined to be 0.20. How tall will your next generation of corn grow to be?

A. 4.4 feet

B. 4.6 feet

C. 5.28 feet

D. 5.6 feet

E. 6.4 feet

74 72 y-38+0.42x 70 68- 66- 64- 62- 60 58- 60 65 70 75 Midparent 420864208 777666665 ane 6uudsJJO

Explanation / Answer

1.A. More than half of the variance in resting heart rate among these families in Sao Paulo is genetic

because offspring ave vs midparent depicts the heritability and the genetics involved in the heritability which is clearly shown by a straight line in the graph.It shows the resting heart rate is genetic .

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.