BIOL 112 Lecture Notes - Lecture 1: Drug Resistance, Zygosity, Advantageous
6 Sep 2016
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Gene: a region of a chromosome that potentially codes for a protein. Phenotype: one"s physical appearance (the outward visual or apparent functional manifestation) Genotype: genes and sequence of inherited dna matters. Allowed him to deduce principles that had remained elusive to others. For every one gene there are two alleles and thus three genotypes. Recessive allele: typically a mutated version of the gene that does not code for a function protein. Sometimes the lack of the protein causes a disease state and other times it does. If an individual is aa genotypically, that individual is going through life without protein a. Nondisjunction: pairs of homologous chromosomes do not separate normally during meiosis. One gamete receives two of the same type of chromosome, and another gam receives no copy. Most cases do not go to full term (the pregnancy); chances are that the mom ctional does not.
