PSYCH 3F03 Lecture Notes - Lecture 4: Rela, Allosome, Abo Blood Group System
13 Sep 2018
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Nucleo de bases - 4 nucleo de bases in our dna, code for protein expression: a: adenine, c: cytosine, g: guanine, t: thymine/u: uracil (rna) - Form base pairs across the chromosome (a-t / c-g) Sex chromosomes (x and y) mendel"s laws 1) Cross-pollina on: rst genera on is all dominant (yellow), second is 3:1 (green: ra o of alleles stabilizes with no selec on pressures punnet squares lomoar cpsd| 2151316. Probability of inheritance: o ex) 2 heterozygous. 25% chance of not carrying or expressing recessive allele. Many traits we thought were caused by 1 gene are actually casued by more. 2 dominant alleles and 1 recessive allele. Both dominant alleles are expressed (not intermediary) Ex) abo blood type a & b are dominant, o is recessive sex-linked inheritance. X-linked recessive inheritance y-chrom doesn"t have to have the allele for the trait to be expressed.
