CAS BI 108 Lecture Notes - Lecture 18: Mendelian Inheritance, Gamete, Mutagen
14 Sep 2019
School
Department
Course
Professor
Document Summary
Will be ss in the f2 generation: law of segregation: 2 copies of a gene separate when an individual makes gametes, keep things apart. Mendel"s crosses: pollen from 1 parent was transferred to the stigma of the other parent, parental generation = p, resulting offspring = first filial generation (f1) If f1 plants self-pollinate, produce second filial generation, f2. If no sry protein present, embryo develops ovaries: a gene on the x chromosome dax1 produces an anti-testis factor (dax1 protein) In males, sry inhibits the dax1 protein thus maleness is not inhibited. In females, who lack sry, dax1 functions to inhibit maleness: secondary sex determination results in outward characteristics of each sex. Inversions: translocations, result from breaking and rejoining, but segment is flipped . In non-homologous chromosomes; segment of dna breaks off and is inserted into another chromosome, can cause duplications and deletions.
