BIOL 112 Lecture Notes - Lecture 10: Okazaki Fragments, Dna Polymerase, Dna Ligase

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Varied

Document Summary

Extranuclear genes=in mitochondria+chloroplast *defects in mito dna reduce cell"s atp production. Mitochondria given to zygote all come from mother. * mitochondria have own ~70s ribosomesthat make mitochondrial proteins in mitochondrial matrix. So all related diseases of mother inherited to child. Homologous pairs = same genes on same chromosome *not necessarily same alleles. Both alleles as dominant - ex: a & b capital = both dominant- ab together co-dom. B- incomplete dom a & a" *a" = not co(cid:373)pletely re(cid:272)essi(cid:448)e so causes i(cid:374)(cid:272)o(cid:373)plete do(cid:373)togethe(cid:396) as aa". Aa aa = 1 aa & 2 aa & 1 aa if aa was lethal = aa & aa as 1:2 ratio. * x-linked recessive xr = if father does not have phenotype none of his daughters display it (xxr) Mitochondrial dna = exception to universality of genetic code *different stop codon. 23 chromosomes in gametes - *individual aabb make equal numbers of 4 gametes= ab/ ab/ ab/ ab.