Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 7, Problem 2AAATB
Summary Introduction
To describe:
A high value of heritability of a trait indicate that the average trait in the population cannot change due to the environmental influence is correct or not.
Introduction:
The quantitative traits are the measurable
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Students have asked these similar questions
What are fixed alleles, how do they affect population? Example provided please
If there are 350 AA homozygotes, 75 AS heterozygotes, and 40 SS homozygotes in a population, how many A alleles are there? How many S alleles are there? What are their allele frequencies? Round to four decimal points.
A gardener grows two different colors of apples under exactly the same environmental
conditions. Red apples have a heritability of 0.14 for the value of apple weight, and green apples
have a heritability of 0.41 for the value of apple weight. The gardener plotted the number of
apples present at each weight. Which graph would you hypothesize represents the red apples?
Number
of
apples
Weight
GRAPH A
Number
of
apples
Weight
GRAPH B
O Graph A
O Graph B
There is not enough information to make a hypothesis.
Chapter 7 Solutions
Biology: Science for Life with Physiology (5th Edition)
Ch. 7 - What is the relationship between genotype and...Ch. 7 - Prob. 2LTBCh. 7 - Prob. 3LTBCh. 7 - Prob. 4LTBCh. 7 - Prob. 5LTBCh. 7 - Scientists have recently developed a process by...Ch. 7 - What is the physical basis for the independent...Ch. 7 - Prob. 8LTBCh. 7 - Prob. 9LTBCh. 7 - Prob. 10LTB
Ch. 7 - Prob. 1GPCh. 7 - Prob. 2GPCh. 7 - Prob. 3GPCh. 7 - Prob. 4GPCh. 7 - Pfeiffer syndrome is a dominant genetic disease...Ch. 7 - Prob. 6GPCh. 7 - A cross between a pea plant that produces round...Ch. 7 - Prob. 8GPCh. 7 - The allele BRCA2 was identified in families with...Ch. 7 - Two parents both have brown eyes, but they have...Ch. 7 - Prob. 2AAATBCh. 7 - Prob. 3AAATBCh. 7 - Prob. 1CTSCh. 7 - Prob. 2CTSCh. 7 - Prob. 3CTS
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- A population of cats can be either black or white; the black allele (B) has complete dominance over the white allele. Given a population of 1,000 cats, 720 black and 280 white, determine the allele frequency, the frequency of individuals per genotype, and a number of individuals per genotype.arrow_forwardFur colour in mice is a single gene trait controlled by two alleles. In a population of 75 mice, 21 are homozygous dominant, 37 are heterozygous dominant, and 17 are homozygous recessive. What is the frequency of the dominant allele in the population? Show all work and record your answer as a value between 0 and 1 rounded to two decimal places.arrow_forwardA population is made up of individuals where 77 have the A1A1 genotype, 65 have the A1 A2 genotype, and 123 have the A2A2 genotype. What is the allele frequency of A1? Answer to 2 decimal places.arrow_forward
- There are 60 dominant homozygotes, 100 heterozygotes, and 25 recessive homozygotes in a population. How many dominant alleles are in the population? How many recessive alleles are in the population? For these alleles, what would be the allele frequencies of both?arrow_forwardWhat does it mean that an allele increases an organism's fitness? Choose one of the following: it increases the likelihood of that organism surviving and reproducing in their current environment it increases the health and strength of the organism it increases the likelihood of that organism surviving and reproducing in ANY environmentarrow_forwardA given autosomal locus has three possible alleles (A1, A2, and A3). Assuming that the numbers of individuals with the six possible genotypes are as follows, what would be the frequency of the A1 allele in the population? A1A1 = 30 A1A2 = 27 A2A2 = 12 A1A3 = 17 A2A3 = 10 A3A3 = 4 What is the frequency of A1 allele in the population? A. 0.375 B. 0.52 C. 0.305 D. 0.175 E. 0.74arrow_forward
- Many genetic disorders, such as cystic fibrosis and sickle-cell disease are due to mutations in a recessive allele. You have sampled an isolated population in which you know that the percentage of the homozygous recessive genotype (aa) is 36%. Using that 36%, calculate: 1f. the frequency of the dominant phenotype if "A" is completely dominant over "a” (round to the nearest hundredth)arrow_forwardWhich of the following statements about quantitative genetics is TRUE? Heritability is the measure of the proportion of an individual's phenotype that is due to genetics. QTL mapping provides an overestimate of the number of genes contributing to a quantitative trait. A threshold trait is measured in whole numbers. An H2 value (broad-sense heritability) that approaches 0.0 means that almost all the phenotypic variation is determined by genetic differences. The h2 (narrow-sense heritability) value is a prediction of the impact that selection may have in altering an initial population by artificial selection.arrow_forwardWhich type of selection (directional, disruptive, stabilizing) changes the overall average phenotype in a population? How does it do this? What does "additive” mean? Why aren't dominant and epistatic variances considered to be additive?arrow_forward
- In a population of 199 individuals, a locus has two alleles: E and e. If 33 individuals have the ee genotype, and the locus is at Hardy-Weinberg equilibrium, what is the frequency of the EE genotype? Round your answer to the second decimal place. Your Answer:arrow_forwardThe graph below shows values for body size in parents and offspring. The data shown are consistent with which of the following situations. ANSWER CHOICES A. variation in body size is completely due to variation in the environment (heritability is 0) B. most of the variation in body size is due to variation in the environment but there is a small effect of genes (heritability is around 0.2) C. variation in body size is completely due to variation in genes (heritability is 1.0) D. most of the variation in body size is due to variation in genes but there is some effect of the environment (heritability is about 0.8)arrow_forwardFlower colour in snapdragon plants is a single gene trait controlled by two alleles.In a population of 350 plants, 56% of the alleles are recessive. What is the frequency of the dominant allele in the gene pool?Record your answer as a value between 0 and 1 rounded to two decimal places.arrow_forward
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