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1 Nov 2018
Positive selection is observed whenever non-synonymous mutations in a gene have
a higher probability of fixation than synonymous mutations in a gene. In Tegula
species, a fitness advantage must explain such an elevated probability of fixation for
non-synonymous mutations in lysin or VERL. In thinking about the fitness achieved
through eggs (which are relatively expensive to produce) and sperm, explain why
you observed stronger positive selection on one of these genes.
Additional info: using MEGA software, the dN/dS ratio for lysin was 1.237 (positive selection) and the dN/dS ratio for VERL was about 1.0 (neutral selection).
Positive selection is observed whenever non-synonymous mutations in a gene have
a higher probability of fixation than synonymous mutations in a gene. In Tegula
species, a fitness advantage must explain such an elevated probability of fixation for
non-synonymous mutations in lysin or VERL. In thinking about the fitness achieved
through eggs (which are relatively expensive to produce) and sperm, explain why
you observed stronger positive selection on one of these genes.
Additional info: using MEGA software, the dN/dS ratio for lysin was 1.237 (positive selection) and the dN/dS ratio for VERL was about 1.0 (neutral selection).
Collen VonLv2
3 Nov 2018
