6. You are studying the physiology of hypertension (high blood pressure) using the rat as a model system and wish to breed a strain of rat which has naturally high blood pressure. Systolic blood pressure is a quantitative trait with a continuous phenotypic distribution. It is measured as millimeters of mercury displaced in a blood pressure meter (mm Hg). You start with a base population of normal domestic rats, which has a mean systolic blood pressure of 120 mm Hg. You select the 10% of the rats which have the highest systolic blood pressure. The average systolic blood pressure value of these selected breeders is 140 mm Hg. You then interbreed the selected rats and measure the systolic blood pressure in their progeny. What would be the average systolic blood pressure in the progeny of the selected breeders if A. heritability = 0.5 ? B. heritability = 1.0 ? C. heritability = 0 ? D. In a second experiment, you go back to that same base population of domestic rats and select the 10% of the animals with the lowest average systolic blood pressure. These selected animals have a mean blood pressure of 100 mm Hg. If heritability = 0.5, what would be the average systolic blood pressure in the progeny of these selected breeders in this second experiment?
6. You are studying the physiology of hypertension (high blood pressure) using the rat as a model system and wish to breed a strain of rat which has naturally high blood pressure. Systolic blood pressure is a quantitative trait with a continuous phenotypic distribution. It is measured as millimeters of mercury displaced in a blood pressure meter (mm Hg). You start with a base population of normal domestic rats, which has a mean systolic blood pressure of 120 mm Hg. You select the 10% of the rats which have the highest systolic blood pressure. The average systolic blood pressure value of these selected breeders is 140 mm Hg. You then interbreed the selected rats and measure the systolic blood pressure in their progeny. What would be the average systolic blood pressure in the progeny of the selected breeders if A. heritability = 0.5 ? B. heritability = 1.0 ? C. heritability = 0 ? D. In a second experiment, you go back to that same base population of domestic rats and select the 10% of the animals with the lowest average systolic blood pressure. These selected animals have a mean blood pressure of 100 mm Hg. If heritability = 0.5, what would be the average systolic blood pressure in the progeny of these selected breeders in this second experiment?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Concept explainers
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
Question
Transcribed Image Text:6. You are studying the physiology of hypertension (high blood pressure) using the rat as a model system and
wish to breed a strain of rat which has naturally high blood pressure. Systolic blood pressure is a quantitative trait
with a continuous phenotypic distribution. It is measured as millimeters of mercury displaced in a blood pressure
meter (mm Hg).
You start with a base population of normal domestic rats, which has a mean systolic blood pressure of 120 mm
Hg. You select the 10% of the rats which have the highest systolic blood pressure. The average systolic blood
pressure value of these selected breeders is 140 mm Hg. You then interbreed the selected rats and measure the
systolic blood pressure in their progeny.
What would be the average systolic blood pressure in the progeny of the selected breeders if
A. heritability = 0.5 ?
B. heritability = 1.0 ?
C. heritability = 0 ?
D. In a second experiment, you go back to that same base population of domestic rats and select the 10% of the
animals with the lowest average systolic blood pressure. These selected animals have a mean blood pressure of
100 mm Hg. If heritability = 0.5, what would be the average systolic blood pressure in the progeny of these
selected breeders in this second experiment?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education