Homework7

Daughter cells (in interphase) Telophase Anaphase 1. How do protein kinases and cyclins re gulate the cell cycle? (ga(\'ms recyme pro&’lh Kinased 2. What role does cell division play in the growth ofan orga cell division helps @ cell Yegrow And divide 3. Whatis the functiof of the centromere region of a chromosome? 1+ holds +he ChypMatids 1OOthey nism? (YY) 4. Whatis a centrosome? How are centrioles and centrosomes related? %Ce Some (5 2 dense Matexial With @ centnoke poir A 115 (enkyx ) niriokes Ayt Found 1N (LNAYDIOES 5. What s the function of spindle fibers? How do they lengthen and shorten? rm 25 A nutlkay membrane +hey) tengthen ¥ Shoren ¥hvouoh mwabdo\'hun + Yeywmovo) oF 6. Whendoesa chromatid become a chromosome? ulin Sub~units en Yhe SISEY chmma’f'»d Sepdraks Aand \iomes 2ASing Kk Chromand 1S 3 thybmosome 7. You have a diploid cell containing eight chromosomes (2n = 8). What would this cell look like at metaphase? How many chromosomes would each of the daughter cells have? 136 Mitosis A 11’\:;’ 9%

individuals: i Create a Punnett square for the cross of two F1 Rk . Ao 27 Indicate the % likelihood of each. kernels in the F2 generaflon'! b o j. What genotypes are possible in F! k. Whatis the expected ratio of purple: yellow |. Counts observed from the hybrid cross corn: purple Kernels: 22 Yellow Kernels: | m. What is your observed ratio of purple: yellow kernels? r counts compare to the expected ratio? Some Qmoeunt o. Isit possible to determine the genctypic ratio from your phenotypic observations of the ear of corn? Explain. %35 .fi dk\'(/‘(‘m'mfi Qo\\‘)Y' n. How doyou Exercise C: Mendel’s Second Law two pairs of homologo s. Draw e alignments during are two possibl ach us chromosomes, there ndicate the alleles present on € 1. Given both possibilities andi metaphase | of meiosi chromosomeé. ] Meitosis 199 ——

¢ all stages indicated 0 3. Draw the chromosomes as they appear for both possvitties a1 1393 FECCL e the the procedure using colors to differentiate the chromosomes. Re! u‘¢ alleles present. ~ “ = O YA 7 - (@) pe 4 - tions of alleles exst? 3 Howmanypoisvble(ombmano s 7 i 7 @ anindividual with the genotype AaBb. what are the possible gametes? Y (/" 2679\9,95, db (l/‘ v enes through the following crosses: P resultsin a 7 N 4. Given ce the path of two unlinked g 5. Using Mendels second law, tra e results ina purple color; P Gene #1: Seed Color (P and p); PP or Pp genotyp ellow color. ; g dosi éene #2: Seed Shape (S ands); SSor Ss genotype resultsina smooth seed; ss genotype resul (ld wrinkled seed. (,: a. Which alleles are present in the gametes of these parent types: (4 . RRsS (purple, smooth)? PP S C i, rrss (yellow, wrinkled)? 9955,,) ppSS A PPSs . PpS) c b. What F1 generation genotype(s) are possible from crossing the two individuals listed above? Use a Punnett square to determine. _ s | Poss | Ppss | PoSS Poss poss 9933 E‘?SS PPSs PPS; PHyS S [PPss 1PPSs [PpSs | Ppis ¢. What phenotype will F1 individuals exhibit? PUYPRR ¢ Smooth d. Crosls two heterozygous individuals from the F1 generation with each other; what are the possible genotypes of the F2 generation (offspring)? Use a Punnett square to determine. Use colored pencils to identify each of the different phenotypes produced by this cross Cilcie all genotypes that resultin a particular phenotype with the same color. : 160 Meiosis