Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 21, Problem 6TYK
Which of the following represents an example of qualitative
a. the lengths of people’s toes
b. the body sizes of pigeons
c. human ABO blood types
d. the birth weights of humans
e. the number of leaves on oak trees
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Watch a youtube video on the example of the Laborador fur color determination. https://www.youtube.com/watch?v=M5IveTJRYyI
In this example, if a laborador dog has golden fur color, what is its genotype?
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6. Use the images from the chart on the following page to write genotype (or genotypes) for each trait.
a. Curly Tail
e. Single Comb
b. Long Hair
f. Wooly Sheep
1 of 3
c. Agouti
g. Drooping Ears
d. Horned
h. Erect Ears
7. Determine the genotypes for each using the chart on the next page.
a. Heterozygous Spike Tail
e. Homozygous Rose Comb
b. Purebred Long Hair
f. Hybrid Hairy Sheep
c. Homozygous Agouti
g. Purebred Erect Ears
d. Hybrid Polled
h. Homozygous Erect Ears
When comparing asthma and cystic fibrosis, the proportion of variance in each illness that can be explained by genetic factors:
a. Is different for different populations
b. is highest in cystic fibrosis
c. is the same for both illnesses
Od. Is highest in asthma
Chapter 21 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 21.1 - If a population of skunks includes some...Ch. 21.1 - Prob. 2SBCh. 21.1 - What factors contribute to phenotypic variation in...Ch. 21.2 - Prob. 1SBCh. 21.2 - Why is the Hardy-Weinberg principle considered a...Ch. 21.2 - Prob. 3SBCh. 21.3 - Which agents of microevolution tend to increase...Ch. 21.3 - Which mode of natural selection increases the...Ch. 21.3 - In what way is sexual selection like directional...Ch. 21.4 - How does the diploid condition protect harmful...
Ch. 21.4 - Prob. 2SBCh. 21.4 - Prob. 3SBCh. 21.5 - How can a biologist test whether a trait is...Ch. 21.5 - Why are most organisms adapted to the environments...Ch. 21 - The reason spontaneous mutations do not have an...Ch. 21 - The phenomenon in which chance events cause...Ch. 21 - Prob. 3TYKCh. 21 - Prob. 4TYKCh. 21 - Prob. 5TYKCh. 21 - Which of the following represents an example of...Ch. 21 - A population of mice is at HardyWeinberg...Ch. 21 - If the genotype frequencies in a population are...Ch. 21 - An Eastern European immigrant carrying the allele...Ch. 21 - If a storm kills many small sparrows in a...Ch. 21 - Prob. 11TYKCh. 21 - Discuss Concepts Many human diseases are caused by...Ch. 21 - Prob. 13TYKCh. 21 - Apply Evolutionary Thinking Captive breeding...Ch. 21 - Prob. 15TYKCh. 21 - Design an experiment to test the hypothesis that...Ch. 21 - Peter and Rosemary Grant of Princeton University...
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- Which of the following is false? a. The color of a fruit fly's eyes is a trait. b. The instructions for producing a trait are found in a gene that controls the physical expression of that trait. c. A gene can have different alleles that can specify different traits, such as red or brown eye color. d. The trait is influenced by the gene, independent of the environment. e. By studying the patterns of traits over generations of an organism, the genetic composition of an organism can be deduced.arrow_forwardIdentify each of the following as an example of allele, genotype, and/or phenotype frequency: A. Approximately 1 in 2500 people of Northern European descent is born with cystic fibrosis. B. The percentage of carriers of the sickle cell allele in West Africa is approximately 13%. C. The number of new mutations for achondroplasia, a genetic disorder, is approximately 5 × 10–5.arrow_forwardHow can each of the following be used in determiningthe role of genetic and/or environmental factors inphenotypic variation in different organisms?a. genetic clonesb. human monozygotic versus dizygotic twinsc. cross-fosteringarrow_forward
- For this worksheet use the following alleles: T=Tall t=short B=blue b=purple M=monkey toes m=regular toes L=large size l=small size E=brown eyes e=blue eyes R=round r=wrinkled G=green g-yellow D=double d=singlearrow_forwardTheHardy-Weinberg principle states that:a.genotypic changes will result in phenotypic changes.b.phenotypic changes will result in genotypic changes.c.allelic frequencies within a population will not change unless certainconditions are met.d.allelic frequencies within a population will change unless certainconditions are met.e.none of the choices apply.arrow_forwardCodominance results in: a. sometimes dominance, sometimes resessiveness b. joint expression of two alleles c. none of the above d. intermediate expression of two allelesarrow_forward
- Relatives are phenotypically similar in part because relatives are genetically similar. Which of the following also contribute to the phenotypic resemblance between relatives and can confound estimating trait heritability? A. Similar microbiomes B. Similar environmental factors C. Similar phenotypic responses to environmental factors D. Non-random association between genotypes and environmental factors E. All of the above Please answer asap and in short and content not be palgarised pleasearrow_forwardA 1:2:1 genotype ratio underlies the 3:1 phenotype ratio in the F2. The purple allele is designated A while the white allele is designated a. What are the genotypes of the 1:2:1 ratio? a. Aa:aa:AA b. AA:aa:Aa c. aa:Aa:AA d. a:AA:Aa e. AA:Aa:aaarrow_forwardA gene for a particular trait that is expressed when two copies (homozygous) or just one copy of the same allele are present (heterozygous), is called a(n): A. Dominant trait. B. Codominant trait. C. Incompletely dominant trait. D. Recessive trait. E. Multiple allele.arrow_forward
- When calculating heritability in finch beak size using parent/offspring data, we find that 70 percent of the variation in the trait is due to genetics. What might explain the remainder of the variation? Select all that apply. A. nutrition B. color C. precipitation D. stress E. rarity F. temperaturearrow_forwardConsider a gene with two alleles, G and g, and heterozygote superiority. Which statement about the fitness of each genotype is correct? A. The fitnesses of the three genotypes would be the same B. The fitness of gg would be greater than that of wither Gg or GG C. There is not enough information to tell D. The fitness of GG would be greater than that of either Gg or gg E. The fitness of Gg would be greater than that of wither gg or GGarrow_forwardConsider the quadhybrid cross (four genes) below: What is the probability of obtaining offspring with the genotype AaBBccDd? O a. Zero (0) O b. 1/32 (or 0.031) O c. 1/16 (or 0.063) O d. 1/4 (or 0.25) O e. 3/8 (or 0.375) AaBbCcDd x AaBBCcDDarrow_forward
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