A 11000 b 14000 c 110000 d 2pn e 2qn compared to

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a) 1/1000 b) 1/4000 c) 1/10,000 d) 2p/N e) 2q/N Compared to outbred risk… if q=1/1000, then 2q x 2q x ¼ = 1/1,000,000
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Relatedness and Inbreeding Challenge: Two full brothers marry two full sisters. Each of these two couples produce a biological child and these “cousins” later wish to marry. Calculate the value of R for these “cousins” and the value of F for the future children of these “cousins”.
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Random Events Random Genetic Drift and the Founder Effect through random changes in allele frequency, populations eventually drift to p=1 or p=0 Allele frequencies can change dramatically in single generation, especially in small populations with small # offspring (basically a sampling “error”) Thus two isolated populations could, via random genetic drift, diverge toward fixation of either the A or the a allele
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Bottlenecks and Population Size Founder Effect, Recovery or Extinction
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Risk of Extinction Greater for Small Populations 3 main reasons: loss of genetic variability and related problems of inbreeding and genetic drift demographic fluctuations due to random variations in birth and death rate environmental fluctuations due to variation in predation, competition, disease and food supply; and natural catastrophes that occur at irregular intervals, such as fires, floods, volcanic eruptions, storms and droughts
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