1. Imagine a population of 100 snails in which the shell colour is controlled by two alleles: B (black) and b (yellow). () What is the total number of loci for shell colour gene in this population? In the snail population described above, 20 out of the snails are yellow (bb) and 80 are black (BB or Bb). Of the 80 black snails=, 30 are homozygous and 50 are heterozygous. How many loci for this gene are occupied by the B (i) allele? (ii) What is the frequency of the B allele? (iv) Assuming that sexual reproduction takes place with random mating, no gene flow and no selection, what will be the frequency of yellow snails in next generation of the population described above? (v) What will be the frequency of the b allele in the next generation of the snail population described below

Biology: The Dynamic Science (MindTap Course List)
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ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
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Chapter21: Microevolution: Genetic Changes Within Populations
Section: Chapter Questions
Problem 7TYK: A population of mice is at HardyWeinberg equilibrium at a gene locus that controls fur color. The...
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1. Imagine a population of 100 snails in which the shell colour is controlled by two
alleles: B (black) and b (yellow).
(1)
What is the total number of loci for shell colour gene in this population?
(ii)
In the snail population described above, 20 out of the snails are yellow (bb)
and 80 are black (BB or Bb). Of the 80 black snails=, 30 are homozygous and
50 are heterozygous. How many loci for this gene are occupied by the B
allele?
(ii)
What is the frequency of the B allele?
(iv)
Assuming that sexual reproduction takes place with random mating, no gene
flow and no selection, what will be the frequency of yellow snails in next
generation of the population described above?
(v)
What will be the frequency of the b allele in the next generation of the snail
population described below
Transcribed Image Text:1. Imagine a population of 100 snails in which the shell colour is controlled by two alleles: B (black) and b (yellow). (1) What is the total number of loci for shell colour gene in this population? (ii) In the snail population described above, 20 out of the snails are yellow (bb) and 80 are black (BB or Bb). Of the 80 black snails=, 30 are homozygous and 50 are heterozygous. How many loci for this gene are occupied by the B allele? (ii) What is the frequency of the B allele? (iv) Assuming that sexual reproduction takes place with random mating, no gene flow and no selection, what will be the frequency of yellow snails in next generation of the population described above? (v) What will be the frequency of the b allele in the next generation of the snail population described below
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