BOZEMAN BIOLOGY VIDEO GUIDE Chromosomal Genetics
Name_______________________________________________Date_____________________________Per_______
1. What are the names of the two scientists that did extensive work
with drosophila (fruit flies)?
2. When Morgan crossed a gray bodied, long winged fly (GgLl)
with a black bodied, vestigial winged fly (ggll), what should he
have seen in the offspring based on Mendel s predictions?
2a. List the phenotypes of the recombinant flies?
2aI. Why do we call them recombinant?
2c. What did Morgan actually find in the offspring (referring to
the ratios)?
2d. Why are the genes not independently assorting?
3. Write the equation we use to calculate the recombination
frequency:
4. Briefly describe incomplete dominance and give an
example:
5. Briefly describe codominance and give an example:
6. Briefly describe pleiotropy and give an example:
7. Briefly describe polygenic inheritance and give an
example:
