By Richard Frankham
Meant for people with a constrained heritage in genetic experiences, this concise, entry-level textual content in conservation genetics is gifted in a uncomplicated structure, with details sincerely highlighted. Solved difficulties are supplied all through to assist illustrate key equations, even though a uncomplicated wisdom of Mendelian genetics and straightforward facts is thought. A thesaurus and proposals for additional analyzing offer extra aid for the reader. a variety of pen-and-ink pics of endangered species convey the cloth to lifestyles. additionally on hand: creation to Conservation Genetics "...balance[s] scholar desire for readability and brevity with the necessities of conservation pros for certain applications." selection 0-521-63014-2 Hardback $130.00 C 0-521-63985-9 Paperback $50.00 D
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Extra resources for A Primer of Conservation Genetics
G. 552). The information is usually reported in the form of allele frequencies, rather than genotype frequencies. We use the letters p and q to represent the relative frequencies for the two alleles at the locus. The frequency of the F allele (p) is simply the proportion of all alleles examined which are F. Note that we double the number of each homozygote, and the total, as the ducks are diploid (each bird has inherited one copy of the locus from each of its parents). 1 shows that 73% of the alleles at this locus are the F allele and 27% are S.
1 Relationship between genotype frequencies and allele frequencies in a population in Hardy–Weinberg equilibrium. 4. Values of p and q, calculated previously, are used to calculate p2 , 2pq and q2 . These frequencies are then multiplied by the total number (67) to obtain expected numbers for the three genotypes. The observed numbers for each genotype are very close to the numbers expected from the Hardy--Weinberg equilibrium. In general, agreement with expectations is found for most loci in large naturally outbreeding populations (more or less random mating).
After separation the fragments are detected by either (1) staining gels with ethidium bromide (a DNA stain), (2) use of radioactively labelled primers and autoradiography of gels, or (3) use of ﬂuorescently labelled primers and running the PCR products on a DNA sequencing machine. If an individual is heterozygous for two microsatellite alleles with different numbers of repeats, then two different-sized bands will be detected, as shown above. Microsatellites typically measure genetic variation for loci that are neutral (not exposed to selection) since the tandem repeats are usually located in non-coding segments of the DNA.
A Primer of Conservation Genetics by Richard Frankham