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Concept explainers
Two populations of deer, one of them large and living in a mainland forest and the other small inhabiting a forest on an island, regularly exchange members who migrate across a land bridge that connects the island to the mainland.
a. If you compared the allele frequencies in the two populations, what would you expect to find?
b. An earthquake destroys the bridge between the island and the mainland, making migration impossible for the deer. What do you expect will happen to allele frequencies in the two populations over the following
c. In which population do you expect to see the greatest allele frequency change? Why?
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Chapter 20 Solutions
Genetic Analysis: An Integrated Approach Plus Mastering Genetics with Pearson eText -- Access Card Package (3rd Edition) (What's New in Genetics)
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- A researcher studies two types of fly populations. Population A have stubby bristles which are both shorter and blunter than population B. This is because the flies are homozygous for a certain allele for the stubble gene which affects bristle length. These flies are ebony coloured with black bodies. This is because they are homozygous for a certain allele for the ebony gene that affects body colour. Population B have longer and tapered bristles than population A and are not stubbly in appearance. This is due to them being homozygous for a different allele for the gene that affects bristle length to population A. These flys are not ebony coloured and have brown bodies. This is due to them being homozygous for the gene that affects body colour. The researcher crosses parental flys (P1) from population A with those from population B and counts the number of offspring that have stubble and non-stubble bristles, and the number of offspring that are ebony-coloured and non-ebony-coloured…arrow_forwardThe human MN blood type is determined by two codominant alleles, LMand LN. The frequency of LM in Eskimos on a small Arctic island is0.80.a. If random mating takes place in this population, what are the expectedfrequencies of the M, MN, and N blood types on the island?b. If the inbreeding coefficient for this population is 0.05, what are theexpected frequencies of the M, MN, and N blood types on the island?arrow_forwardAssume you are studying a trait that affects boldness in blackbirds. You discover that boldness is a quantitative trait with many loci affecting the phenotypic value of the trait. Given that you know it's a phenotypic trait, is any single QTL likely to have a strong effect on the phenotypic value of the trait?  a. Yes  b. No  c. It depends on the environment  d. Not enough information to tellarrow_forward
- Issues with inbreeding often occurs with dog breeds, such as German shepherds. How can we the best describe inbreeding? a. successive breeding with individuals from a variety of populations b. successive breeding within individuals from within one population c. breeding between different breeds to produce new breeds d. breeding the same set parents more than oncearrow_forwardIn a particular species of flower, C1 codes for red flowers, C2 codes for white, with the heterozygous individuals being pink. A. In the frequency of pink individuals in the population was .7126, would you be able to estimate the frequencies of the individuals alleles in the population? Why or why not? B. If the frequency of red individuals in the population was .329, what would the estimated frequency of pink and white individuals be in the same population?arrow_forwardIn a population of 200 mice, 98 are the homozygous dominant for brown fur (BB), 84 are heterozygous (Bb), and 18 are homozygous recessive for white fur (bb). a. The genotypes frequencies of this population arearrow_forward
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