SCI 115 University of Florida Introduction to Biology Questions

QUESTION 1

1. Genetic recombination as a result of crossing over occurs more readily between genes that are ____.a. located on different chromosomesb. on the sex chromosomesc. located close together on the same chromosomed. near the centromeree. located far apart on the same chromosome

4 points

QUESTION 2

1. Observable traits are known in genetics as ____.a. homozygousb. phenotypesc. heterozygousd. homozygous genotypese. genotypes

4 points

QUESTION 3

1. The process by which chromosomes fail to separate during meiosis is called ____.a. nondisjunctionb. polyploidyc. aneuploidyd. monosomye. trisomy

4 points

QUESTION 4

1. If tall (D) is dominant to dwarf (d), and two homozygous varieties DD and dd are crossed, the progeny produced will be____.a. 3/4 tall, 1/4 dwarfb. 1/2 tall, 1/2 dwarfc. all dwarfd. all talle. all intermediate forms

4 points

QUESTION 5

1. Red coat is dominant in horses and white coat is recessive. In a cross between a homozygous dominant red-coated horse and a white-coated horse, what genotype(s) would be observed in the offspring?a. half homozygous dominant and half homozygous recessiveb. half heterozygous and half homozygous dominantc. all heterozygousd. all homozygous recessivee. all homozygous dominant

4 points

QUESTION 6

1. Which special property of Taq polymerases make them useful for PCR?a.they are stable at high temperaturesb.their hydrogen bonds do not break at low pHsc. they multiply quicklyd. they are easy to isolate from common fungie. they paste two DNA fragments together

4 points

QUESTION 7

1. One of the advantages of PCR is the ability to ____.a. make millions of copies of the entire genomeb.make millions of copies of a rare DNA sequencec.sequence DNAd. double the amount of a rare DNA sequencee. transcribe DNA into mRNA transcripts

4 points

QUESTION 8

1. In gene therapy, what is transferred into an individual’s chromosomes?a. a mutated geneb. an unmutated genec. DNA librariesd.a new genomee. bacterial plasmids

4 points

QUESTION 9

1. The technique of ____ analyzes 500,000 SNPs in an individual’s genome.a. DNA cloningb. SNP-chipsc. cutting and pastingd.electrophoresise. PCR

4 points

QUESTION 10

1. GMO crops such as ____ help farmers use smaller amounts of toxic pesticides because these crops are pest resistant.a. glyphosphateb. Golden Ricec. A. tumefaciens cornd. Bt corn and soye. Ti corn and rice