Biology 1001A Lecture Notes - Lecture 17: Chloroplast Dna, Coin Flipping, Genomic Imprinting
14 Mar 2016
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Genetic conflict can occur early between mother and child. Degree of asymmetry in relatedness not as related to future offspring than yourself, etc. Monogamous is greedy but not as greedy in promiscuous. Asymmetry in relatedness leads to conflict in investment interest. ~1% of genes in mammals have only one allele expressed (either maternal or paternal) Not both expressed like normally, only one depending on locus: loci at where only one allele is expressed is called imprinting. Most of these genes regulate embryonic growth (the rest are expressed in the brain: loci with only maternal expression: downregulate growth, loci with only paternal expression: upregulate growth. Best way to extract (suck) as much resources as possible, like a leech! Conflict between father"s and mother"s genetic interests play out during offspring development. Some conflict arise from uniparental transmission of non-nuculear genomes: Mtdna inherited maternally mitochondrial dna cpdna sometimes inherited maternally, sometimes paternally chloroplast dna.
