INTER-LS 101 Lecture Notes - Lecture 32: Haemophilia, Llama, Petal
29 Nov 2016
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Document Summary
Biology of vision - lecture 32 - genetic eye disease (11/23/16) Gene and environment interaction: g x e interaction. What: gene is piece of dna, sequence of gene determines structure and function of specific functional proteins. Dna mrna protein is similar to computer"s program working copy specific function. Genes located within dna of cell nucleus. Trisomy 21 - another copy within 21st pair instead of 2 copies like normal. Genes work by specifying amino acid sequence of a protein. Gene : bit of dna with instruction for protein. People have used genetic alteration on plants and animals for long time (sunflowers, llama) People have had genetic diseases (hemophilia in royal uk family) Found dominant genes by repeating and breeding peas to see what was dominant and common phenotype. Normal cell (somatic cell) has 2 variants (called alleles) for mendelian trait. Gamete: sex cell (pollen, egg, sperm) contains 1 allele - randomly chosen from 2 somatic alleles.
