8,611 reputation
11542
bio website zoology.ubc.ca/~matthey
location Vancouver, Canada
age
visits member for 1 year, 3 months
seen 6 hours ago

My name is Remi Matthey-Doret and I am a PhD Candidate at the University of British Columbia (UBC), Department of Zoology in the lab of Mike Whitlock. I am a theoretician passionate about population genetics and conservation genetics.

Please have a look to my webpage for more information.


14h
revised How prominent is the gene-centric view of evolution among professional researchers?
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14h
answered How prominent is the gene-centric view of evolution among professional researchers?
18h
awarded  Nice Answer
1d
revised Why haven't land animals evolved beyond urination?
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2d
accepted Are there multicellular isogamous species?
Oct
19
comment Why are recombination rates increasing in mammals?
Does chromosomal divergence cause speciation? Intuitively, I'd say yes. Assuming that chromosomal divergence would yield to outbreeding depression (OD), then OD causes post-zygotic isolation which causes a selection pressure to increase the pre-zygotic isolation. I have absolutely no idea however of whether such mechanisms is an important factor to explain speciation in mammals and I might be wrong assuming that chromosomal divergence causes OD.
Oct
19
comment Why are recombination rates increasing in mammals?
With low recombination chromosomes diverge following the same logic that makes two non-interbreeding population to diverge through time (just by the neutral processes of mutations and drift).
Oct
19
revised Are there multicellular isogamous species?
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Oct
19
revised How many cells in apical meristem
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Oct
18
comment Ancestral states of sex determination system
No, I don't have it. I very often want to buy it but I stop right before doing so when I see its price! I read part of this book during my master degree, just before it got published for a class I attended at the University of Lausanne with Nicolas Perrin (one of the two authors) and I really appreciate it. It was for me a totally new subject and the book made a good job to introduce me into it. I also thought that the book makes a good job of providing both a good theoretical understanding and a rather impressive list of study cases separately into different paragraphs.
Oct
18
comment Cost of Substitution explained
Without reading the article, I would tend to think that the cost of substitution correspond to the addition of loads for a given new mutation that will get fixed, where the load at any given time is the difference between the fitness of the best possible genotype $MM$ (homozygote for the beneficial mutant allele) and the realized mean fitness of the population ($x_t^2W_{wt,wt} + 2x(1-x)W_{Wt,M} + (1-x_t)^2W_{MM}$), where $W_{H,G}$ if the fitness of the individuals having variants $H$ and $G$ and $x_t$ is the frequency of the wildtype allele at time $t$. $w_t$ means wildtype allele.
Oct
18
comment Ancestral states of sex determination system
Yes, as argued in Evolution of Sex Determination all liability factor (factor that define the sex relative to a threshold) follows a norm of reaction and therefore the concept of GSD makes sense only by defining the range of environmental condition where which the sex is only defined by the genes. But I think my question is still of interest even to the light of a more accurate definition of GSD and ESD.
Oct
17
comment Why is gynodioecy common and androdioecy rare?
I think the short answer is along the lines of: Because ovules represent the limiting factor while there are plenty of pollen grains. Males have a hard time surviving in a androdoiceous population while female might be able to survive in a gynodioceous if it spares enough energy (by not producing any pollen grains) to create ovules. One advantage for a female of not being hermaphrodite compare to other individuals in the population is that it won't lose ovules to produce inbred offspring by selfing.
Oct
17
revised Somatic Mutations in meristem tissue in plants
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Oct
17
revised How many cells in apical meristem
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Oct
17
revised What is the allelic frequency at mutation-selection-drift equilibrium?
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Oct
17
revised Ancestral states of sex determination system
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Oct
17
revised What is most ancestral: isogamy or anisogamy?
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Oct
17
revised Ancestral states of sex determination system
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Oct
17
revised Are there any multicellular forms of life which exist without consuming other forms of life in some manner?
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