Biology 1001A Lecture Notes - Lecture 17: Chloroplast
31 May 2016
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More parent-offspring conflict in promiscuous species vs monogamous: more closely related to siblings in monogamous species (1 mate, promiscuous (many mates) Parental conflict and genomic imprinting: 1% of genes in mammals have only one allele expressed (either maternal or paternal) [imprinting, most of these genes regulate embryonic growth (the rest are expressed in the brain) Loci with only maternal expression: downregulate growth. Extract as much resources as possible from this female: conflict between father"s and mother"s genetic interests plays out during offspring development. Some conflicts arise from uniparental transmission of non-nuclear genomes: nuclear genes inherited biparentally, mtdna inherited maternally (mitochondrial, cpdna sometimes inherited maternally, sometimes paternally (chloroplast) Cooperation, conflict and relatedness: many altruistic" traits can be explained by shared genetic interests, even when genetic interests overlap (individuals within a family; genomes within an individual) they can be different enough to induce conflict. Not all helpful behaviours are directed toward relatives.
