Question 5 Use the following diagram to answer questions 4 and 5: Chose the appropriate letter. 14N DNA 14N-N hybrid DNA NONA 08088 B. C. D. Microorganisms from another planet where found on a meteor. Analysis shows that it is a carbon based life form that has DNA. These cells were placed in 15N for several generations and then transferred to 14N medium. Which pattern in the above figure would you expect if the DNA was replicated in a conservative manner? A) A B) B C) C D) D E) E Question 6 DNA ligase is an enzyme that A) is used to tie parts of a DNA molecule together B) is used in mutation repair of DNA molecules C) works with DNA and RNA polymerase at various times in the cell OD) all of the above E) none of the above
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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