BIOL 190 Midterm: Lecture 11 Exam Review

• School: University of San Diego
• Department: Biology Courses
• Course: BIOL 190
• Professor: Leavitt, Dean

Document Summary

Males being born with female genitalia and growing male genitalia at the age of 12. It turned what hormone into what related hormone: turned testosterone into dihyddrotestosterone (dht) Relate mutation to the four postulates that describe evolution. Variation - mutation allows species to develop difference. Helpful mutations will increase survival and number of offspring. Germ-line are passed to offspring, somatic mutations stay within original species and are not passed on. A point mutations affects only one nitrogenous base. De ne transition and transversion and be able to identify each. Which has more possibilities: transversion - pyrimidine to purine or purine to pyrimidine, more. Transition - purine replaces purine, pyrimidine replaces pyrimidine possibilities yet occurs less. Different codons can code for same amino acid. Silent: codon mutation still codes for same amino acid synonymous. De ne silent (synonymous) mutations, missense (nonsynonymous/ replacement) and nonsense mutations: missense: different amino acid is coded for, nonsense: stop codon is coded for.