KEY FOR QUIZ 4: GENETICS Topic # 3032 By: Alisa Amy Kowalski 1. What types of plants did Gregor Mendel use in his genetic experiments? Pea plants 2 During segregation chromosomes go from a pair to singles. (Fill in the blanks) 3. Fill in the following chart Number of Chromosomes Animal n Cattle 30 Sheep 27 Swine 40 Humans 23 4. 2n 60 54 80 46 Name the four nitrogenous bases of DNA. Adenine (A), Thymine (T), Guanine (G), & Cytosine (C) 5. What does the double helix do in the first stage of replication of DNA? It unwinds 6. What is the role of Messenger RNA (mRNA) It helps complete the building of the protein Physically sequences the amino acids that are carried to the building site by the tRNA and chemically connected by the rRNA 7. If replication of DNA were to be compared to the building of a house, what would the DNA be compared to? It would be the original blueprint that is kept in the main office (nucleus) that directed the plan.