Answer Happy

Which of the following types of mutation, resulting in an error in the mRNA just after the AUG start of translation, is likely to have the most serious effect on the polypeptide product? O a. a deletion of a codon O b. a neutral point mutation. Oc. a substitution of the third nucleotide in an ACC codon Od. an insertion of one codon Oe. a deletion of two nucleotides resulting in a frameshift
A plasmid that is 8000 base pairs has two EcoR I restriction sites at base pair 400 and 2500. It also contains one Pvu I site at base pair 5200. If the plasmid was digested by both restriction enzymes, how many fragments and of what size would you expect? Select one: O a. 3 fragments; 5200, 2700, 2100 bp Ob 2 fragments; 2700, 2100 bp Oc. 3 fragments; 3200, 2700, 2100 bp O d. 2 fragments; 5000, 3000 bp Oe. 3 fragments; 5200, 2500, 400 bp
Which process accounts for aneuploidy? Select one: O a. Independent assortment O b. X inactivation OC. Nondisjunction O d. Gamete junction Oe. Genetic recombination
You have in your possession a microscope slide with meiotic cells on it and a light microscope. What would you look for if you wanted to identify metaphase I cells on the slide? Select one: Oa. A cleavage furrow Ob. A synaptonemal complex Oc. Tetrads lined up at the center of the cell Od. Separated sister chromatids at each pole of the cell Oe. A visible nuclear envelope