BSCI 105 Lecture Notes - Lecture 23: Asexual Reproduction, Sexual Reproduction, Phenotype

• School: University of Maryland
• Department: Biological Sciences Program
• Course: BSCI 105
• Professor: Dr.Keller

Document Summary

What do we mean by inheritance: organisms do not vary in appearance over time, parents pass on variations in appearance and behavior to their offspring, offspring mimic the behavior and values of their parents. What is least like to be involved in reproduction: phosholipids, dna, rna, proteins. The best evidence for dna as the molecule of inheritance is based on what phenomenon in bacteria: transformation, transmutation, binary fission, pathogenicity. Which structural aspect of dna do you think made watson and crick believe there was an obvious copying mechanism: double helix, phosphodiester bonds, strict base pairing, antiparallel strands. Phenotype- what one looks like, what traits one has. Heritable variation- differences in traits get passed onto offspring. Gene-a unit of heritable material that defines a trait. Alleles- different versions of a gene that explains variations in a trait. Variation occurs between clonal lineages of an organism. Within a lineage, offspring and parents look exactly the same (usually)