FA2011lecture20

FA2011lecture20 - Today: what if there is migra&on...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
f(aa) f(Aa) f(AA) If there is inbreeding, f(aa) > q 2 ; f(AA) > p 2 ; f(Aa) < 2pq but inbreeding by itself does not Today: what if there is migra&on (gene flow) or the popula&on is small (gene&c driF)?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
GENE FLOW: movement of alleles into or out of a population as a result of migration f(A) in “recipient” population = p R f(A) in “donor” population (migrants) = p D f(A) in conglomerate population = p C m = proportion of individuals in conglomerate population that are from the donor population (migrants), so 1 - m = proportion from recipient population p C = mp D + (1 – m)p R Δ p = p C - p R = mp D + (1 – m)p R - p R = mp D + p R - mp R - p R = mp D – mp R = m(p D - p R ) Note: as you would expect, if p R = p D then Δp = 0
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Probability of fixation = 1/(2 N) Probability of elimination = 1-1/(2 N) New mutations will arise at a frequency proportional to population size (N)
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

FA2011lecture20 - Today: what if there is migra&amp;on...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online