BIO120H1 Lecture Notes - Lecture 6: Dioecy, Tangled, Asexuality
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BIO120H1 Full Course Notes
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In water fleas, different reproductive system occur in different environments. When roots hit substrate, it"s time to stop cloning, cue flowering. Time and energy to find and attract mates. A sexual female contributes only 50% of her genes to the next generation compared to asexual female: transmission bias favoring asexual. Bring together favorable mutations (long term benefit) Benefit of genetic variation in variable environments (short term benefit, lottery : spatially heterogeneous environments (tangled bank hypo, temporally heterogeneous (red queen hypo) Wait a long time to get abc by mutation in clonal. Also good way to get rid of deleterious genes. ***higher rates of sex maintained in populations evolving in heterogeneous habitats** Asexuality sporadically distributed across animal kingdom , invertebrates>verts. Asexual more common in plants, but very few exclusively. Long term evo potential prob low lack of genetic variation. Mate more closely related than random=inbreeding: continuum between the two. Homozygosity for deleterious recessive alleles result in inbreeding depression.
