Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 29, Problem 1EQ
Two populations of snakes are separated by a river. The snakes cross the river only on rare occasions. The snakes in the two populations look very similar to each other, except that the members of the population on the eastern bank of the river have a yellow spot on the top of their head, whereas the members of the western population have an orange spot on the top of their head. Discuss two experimental methods that you might use to determine whether the two populations are members of the same species or members of different ones.
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A researcher is studying two fly populations.
Population A have stubbly bristles that are shorter and blunter than population B and are ebony coloured with black bodies. This is because they are homozygous for a certain allele for the stubble gene which affects bristle length and homozygous for the ebony gene which affects body colour.
Population B have longer tapered bristles than population A and are not stubbly in appearance. They are not ebony and have brown bodies. This is because they are homozygous for a different gene that affects bristle length to population A and are homozygous for the gene that affects body colour.
Table 1:
F1 ebony flies - 0
F1 non-ebony flies - 560
F1 stubble flies - 560
F1 non-stubble flies - 0
Draw two separate Punnett Squares to illustrate the P1 cross - one for the stubbly alleles and one for the ebony alleles showing the individual gametes of each parent and the combination in the resulting F1 offspring.
You are a scientist studying a population of beetles. Beetle color is controlled by two alleles at a single
genetic locus. AA beetles are blue, Aa purple, and aa pink. You count 30 blue beetles, 10 purple
beetles, and 40 pink beetles.
a) What is the frequency of the A allele? [ Select ]
b) What is the observed frequency of the Aa genotype? 1 Select ]
c) Under Hardy-Weinberg equilibrium, what is the expected frequency of the aa gentoype?
[ Select ]
d) Is this beetle population evolving? I Select ]
Clines in body size have been observed in many species, such as the latitudinal cline in moose shown in Figure 8.2 (shown in the previous question).
How might you determine whether a cline in body size was caused by clines in allele frequencies? Which of the following is NOT one of the strategies to test this?
Group of answer choices
A.) Measure and assess the morphological character in multiple individuals along the cline and statistically compare them for significant differences.
B.) Swap individuals or seeds from one end of the cline with those at the other end of the cline, and vice-versa, and then measure and assess how they grow.
C.) Grow or raise individuals from different parts of the cline under the same conditions, in a common garden experiment, and then measure and assess how they grow.
D.) Identify the genes coding for that morphological character, sequence them in multiple individuals across the cline, and then compare them for variation in sequence, structure,…
Chapter 29 Solutions
Genetics: Analysis and Principles
Ch. 29.1 - Prob. 1COMQCh. 29.1 - Prob. 2COMQCh. 29.1 - 3. A pair of birds flies to a deserted island and...Ch. 29.1 - Prob. 4COMQCh. 29.2 - 1. Phylogenetic trees are based on
a. natural...Ch. 29.2 - Prob. 2COMQCh. 29.2 - An approach that is used to construct a...Ch. 29.2 - 4. Horizontal gene transfer is a process in which...Ch. 29.3 - Prob. 1COMQCh. 29.3 - Prob. 2COMQ
Ch. 29.3 - When the chromosomes of closely related species...Ch. 29 - 1. Discuss the two principles on which evolution...Ch. 29 - 2. Evolution, which involves genetic changes in a...Ch. 29 - Prob. 3CONQCh. 29 - Prob. 4CONQCh. 29 - 5. Would each of the following examples of...Ch. 29 - Distinguish between anagenesis and cladogenesis....Ch. 29 - 7. Describe three or more genetic mechanisms that...Ch. 29 - Explain the type of speciation (allopatric,...Ch. 29 - Prob. 9CONQCh. 29 - Prob. 10CONQCh. 29 - Discuss the major differences among allopatric,...Ch. 29 - Prob. 12CONQCh. 29 - Prob. 13CONQCh. 29 - Would the rate of deleterious or beneficial...Ch. 29 - 15. Which would you expect to exhibit a faster...Ch. 29 - Prob. 16CONQCh. 29 - 17. Plant seeds contain storage proteins that are...Ch. 29 - Take a look at the -globin and -globin amino acid...Ch. 29 - Compare and contrast the neutral theory of...Ch. 29 - Prob. 20CONQCh. 29 - 21. As discussed in Chapter 27, genetic variation...Ch. 29 - Prob. 22CONQCh. 29 - Two populations of snakes are separated by a...Ch. 29 - 2. Sympatric speciation by allotetraploidy has...Ch. 29 - 3. Two diploid species of closely related frogs,...Ch. 29 - A researcher sequenced a portion of a bacterial...Ch. 29 - F1hybrids between two species of cotton,Gossypium...Ch. 29 - 6. A species of antelope has 20 chromosomes per...Ch. 29 - Prob. 7EQCh. 29 - 8. Prehistoric specimens often contain minute...Ch. 29 - From the results of the experiment of Figure...Ch. 29 - InChapter 23, a technique called fluorescence in...Ch. 29 - Prob. 11EQCh. 29 - 12. Discuss how the principle of parsimony can be...Ch. 29 - 13. A homologous DNA region, which was 20,000 bp...Ch. 29 - Prob. 14EQCh. 29 - Prob. 1QSDCCh. 29 - 2. Compare the forms of speciation that are slow...Ch. 29 - 3. Do you think that Darwin would object to the...
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