BICD 100 Lecture 7: Sex Chromosomes and sex determination
5 Feb 2019
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Ec opportunity: survey to get your input on course. Respond by 8 am on tuesday, february 5th. In addition to dna in the nucleus, there is also dna in the mitochondria. Eggs contain mitochondria and sperm mostly do not mitochondrial inheritance. Mutations in genes encoded in the mitochondrial genome show maternal inheritance. Myoclonic epilepsy and ragged-red fiber disease (merrf) (translation defect in mitochondria) Children of affected mothers have trait but children of affected fathers do not. Goal is to avoid transmission of mitochondrial diseases. New reproductive option for women with mitochondrial disease. Mother deposits gene products into the egg mrna, protein, growth factors, etc. Material can contribute to the phenotype of the offspring. Genotype of female parent, not the genotype of the offspring, determines the phenotype of the offspring. Bicoid is required for fly head formation or the larva will have two posteriors instead of a normal head and posterior. Dextral is dominant trait and sinistral is recessive.
