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Use with Bozeman Video: A Beginner’s Guide to Punnett Squares—12:15 DNA Replication—10:10 Transcription and Translation—11:57 Unit 6—Genetics Punnett Squares 1. What does the inside of a Punnett Square represent?________________________ 2. How many traits does a monohybrid cross examine?_________________________ 3. Briefly explain what the terms homozygous and heterozygous mean. ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ 4. What is the difference between a genotype and a phenotype? ___________________________________________________________________________ ___________________________________________________________________________ 5. How many traits are examined in a dihybrid cross? _________________________ 6. When you complete a dihybrid cross between two organisms that are heterozygous for both traits (example: RrYy x RrYy) what should the phenotypic ratio always be? _______________________________________________ DNA Replication 1. During which cell cycle phase do eukaryotes copy their DNA? ____________________________________ 2. Which theory of DNA replication is the correct theory as determined by the Meselson-Stahl experiment? ______________________________________________________________________________________ 3. What is meant when DNA is described as anti-parallel? ______________________________________________________________________________________ 4. What are some of the important enzymes involved in DNA replication? ______________________________________________________________________________________ 5. Explain the difference between a leading strand and a lagging strand. ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ Use with Bozeman Video: A Beginner’s Guide to Punnett Squares—12:15 DNA Replication—10:10 Transcription and Translation—11:57 6. What is an origin of replication? ______________________________________________________________________________________ Transcription and Translation 1. In the video example, DNA is similar to a _____________________, ribosomes to a _________________________, amino acids to the ________________________, and proteins to pizza. 2. What is the Central Dogma of DNA? __________________________________________________________________________________________ __________________________________________________________________________________________ 3. What is transcription? _____________________________________________________________________ 4. What is translation? ______________________________________________________________________ 5. What is the ultimate end result of transcription and translation? After watching the videos, complete the following questions: 1. TT represents an organism that is a. Homozygous recessive b. Heterozygous c. Homozygous dominant 2. A heterozygous organism is represented as a. rr b. RR c. Rr 3. The best definition for phenotype is a. The genes that an organism has b. The physical appearance of an organism c. The ratio determined by completing a Punnett Square 4. If you completed a dihybrid cross of RrTt x RrTt you should always get the ratio a. 1:2:2:2:2:2:2:2:1 b. 1:1 c. 3:1 d. 9:3:3:1 Use with Bozeman Video: A Beginner’s Guide to Punnett Squares—12:15 DNA Replication—10:10 Transcription and Translation—11:57 5. During which part of the cell cycle does DNA copy itself a. b. c. d. M G1 S G2 6. Which is not one of the three parts of a DNA nucleotide a. Ribose b. Deoxyribose c. Phosphate d. Nitrogenous base 7. Which of the following differences between DNA and RNA is not true a. DNA is double stranded and RNA is single stranded b. DNA has phosphates and RNA has no phosphates c. DNA has deoxyribose and RNA has ribose d. DNA has thymine and RNA has uracil 8. Which of the following is not an important enzyme in DNA replication a. DNA polymerase b. Helicase c. Amylase d. DNA ligase 9. Transcription is a. Making RNA into proteins b. Making mRNA into rRNA c. Making DNA into mRNA d. Making a new copy of DNA Use with Bozeman Video: A Beginner’s Guide to Punnett Squares—12:15 DNA Replication—10:10 Transcription and Translation—11:57 10. Where does transcription occur a. Nucleus b. Cytoplasm c. Chloroplasts d. Mitochondria 11. Which of the following is not a type of RNA a. mRNA b. pRNA c. rRNA d. tRNA 12. Where are proteins manufactured, in other words, where does translation occur a. Golgi apparatus b. Nucleus c. Lysosomes d. Ribosomes 13. What are the basic building blocks of proteins a. Amino acids b. Simple sugars c. Nucleotides d. Starches 14. Once a protein is fully formed is it a. One dimensional b. Two dimensional c. Three dimensional