MEDI110 Lecture 23: Week 11 Lecture B, Genes and Chromosomes
30 Oct 2018
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Document Summary
Basics on gene and chromosomal disorders in development. Genomes determine everything about us, our physical self, and behaviours, highly determined. About 20,000 genes which are a code for protein. Genotype (combination of 20,000 genes makes me as an individual) Phenotype physical manifestation of the combination of genes present in the cells of an individual, what bits actually express to give me the differences in people. 22 pairs of autosomes pairs (development of the body) The cell future depends on the particular gene/dna in that exact cell. Sex cells (mitosis) sexual reproduction via meiosis gametes. In meiosis you have a chromosome from one cell going to the chromosome of another cell. 223 8 million options between chromosomes from genomes, without swapping over (mixing chromones). If a person with a recessive genetic disease gene which isn"t expressed has a child with someone who has a recessive gene there is a 1 in 4 chance with those genetic disorder.
