Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Skewed X-inactivation wikipedia , lookup
Point mutation wikipedia , lookup
Y chromosome wikipedia , lookup
Vectors in gene therapy wikipedia , lookup
Polycomb Group Proteins and Cancer wikipedia , lookup
Microevolution wikipedia , lookup
History of genetic engineering wikipedia , lookup
Neocentromere wikipedia , lookup
Meiosis Station 1. Write the following statements in the correct column on your paper. Either “Mitosis” or “Meiosis” Makes haploid cells (1n) Makes four cells Makes diploid cells (2n) Makes genetically identical cells Makes genetically unique cells Makes two cells Makes gametes Goes through 2 cell divisions Goes through one cell division 2. Draw the phases of mitosis (Hint: it looks like the first four phases of Meiosis). 3. Put the pictures in the correct order using the letters. A B C D 4. Write the following statements next to the correct phase on your paper Two cells are created Crossing over occurs here Chromosomes line up in the middle Chromosomes line up in the middle Independent assortment occurs here when the chromatids move apart Four cells are created Chromosomes move apart DNA does NOT replicate and centrioles move toward opposite sides Punnet Practice Problems. Part A: Guinea pigs were a popular model for observing genetics in early genetic studies (as were fruit flies). Try these problems involving Guinea pig genetics. In guinea pigs, the allele for short hair is dominant. (Use R’s) 1. What genotype would a heterozygous short haired guinea pig have? _______ 2. What genotype would a purebreeding short haired guinea pig have? _______ 3. What genotype would a long haired guinea pig have? ________ 4. Show the cross for a pure breeding short haired guinea pig and a long haired guinea pig. What percentage of the offspring will have short hair? Part B: Butterflies can either be yellow (Y), blue (B), or blue and yellow spotted (YB). Predict the offspring coloring of a yellow male and blue and yellow spotted female 5. Phenotype: __________________ 6. Genotype: _________________ 7. % yellow ________________ 8. % blue _______________ 9. % blue and yellow spotted: ______________ Part C: Black rats (B) are incompletely dominant to white rats (W). A gray rat (BW) is made by black and white rats mating. Predict how many offspring will be black, white, and gray when a gray rat mates with a white rat. 10. Phenotype: __________________ 11. Genotype: _________________ 12. % black ________________ 13. % white _______________ 14. % gray: ______________ Chromosome Structure Directions: 1. Read pages 151-153 2. Draw and label figure 8.1 on page 151. 3. Answer the questions below. Cell Questions 1. Which is bigger, a segment of DNA or a chromosome? 2. What is the relationship between a molecule of DNA and a chromosome? 3. Where do you see helixes (spirals) in this figure? 4. Name the protein that DNA wraps around. 5. How does the structure and location of a prokaryote chromosome differ from that of a eukaryotic chromosome? 6. Is there a correlation between the number of chromosomes and the complexity of an organism? Give an example.