08-22 - BIO 5099 Molecular Biology for Computer...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 5099: Molecular Biology for Computer Scientists (et al) Lecture 2: Evolution http://compbio.uchsc.edu/hunter/bio5099 [email protected] Housekeeping Fax number for problem sets: 303-556-2889 Remote video rooms UCHSC is School of Medicine 5631 Colorado Springs is EPC 101 Boulder (Thursdays only) is STA 308 Remove viewing etiquette: Remote students who want to ask a question should just push your mic button and say “excuse me” at any time. If you are in the same room I am, please use your mic button before you ask a question so everyone can hear.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Errata I will make mistakes in this class, but I will try to correct them as soon as possible. I missed by a factor of 1000x the number of extant species in the world. (Thanks, Dan) http://www.all-species.org : “~1.7 million species have been identified and described. Estimates of undiscovered species on Earth range from 10 million to 100 million” Review of Basic Ideas in Evolution All organisms are part of a continuous line of descent. This is the only statement in biology to which there is no exception. Evolution is the force that created both the unity and the diversity we see today. Three elements of any evolutionary process: Inheritance Variation Selection (by reproductive success)
Background image of page 2
Inheritance isn't everything All of an organism's characteristics, taken together, are called its phenotype . Traits and environment create phenotype. Organisms with exactly the same traits may have quite different phenotypes. E.g. Morphology of the arrowroot plant depends on root depth. Two different kinds of reproduction with different inheritance patterns Single celled organisms reproduce by mitosis Offspring have all of the same traits as the parent Exception is due to mutation (random change) Multicellular organisms reproduce by meiosis, the process underlying sexual reproduction. Offspring have a combination of the traits of the parents Mutation also occurs What is the relationship between the traits of the parents and the traits of the offspring in sexual reproduction?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Blending versus Particulate Traits Offspring were long thought to be blends (or averages) of traits of parents. However, if this were true, than all variation would very quickly disappear. Darwin observed this, but never resolved the problem. Answer is Mendel's particulate traits. Traits do not blend, but are inherited as units. Traits from either one or the other parent are passed on.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 17

08-22 - BIO 5099 Molecular Biology for Computer...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online