SCI 115 University of Florida Introduction to Biology Questions

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QUESTION 1

1. Genetic recombination as a result of crossing over occurs more readily between genes that are ____.

   	a.	located on different chromosomes
   	b.	on the sex chromosomes
   	c.	located close together on the same chromosome
   	d.	near the centromere
   	e.	located far apart on the same chromosome

4 points

QUESTION 2

1. Observable traits are known in genetics as ____.

   	a.	homozygous
   	b.	phenotypes
   	c.	heterozygous
   	d.	homozygous genotypes
   	e.	genotypes

4 points

QUESTION 3

1. The process by which chromosomes fail to separate during meiosis is called ____.

   	a.	nondisjunction
   	b.	polyploidy
   	c.	aneuploidy
   	d.	monosomy
   	e.	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 dwarf
   	b.	1/2 tall, 1/2 dwarf
   	c.	all dwarf
   	d.	all tall
   	e.	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 recessive
   	b.	half heterozygous and half homozygous dominant
   	c.	all heterozygous
   	d.	all homozygous recessive
   	e.	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 temperatures
   	b.	their hydrogen bonds do not break at low pHs
   	c.	they multiply quickly
   	d.	they are easy to isolate from common fungi
   	e.	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 genome
   	b.	make millions of copies of a rare DNA sequence
   	c.	sequence DNA
   	d.	double the amount of a rare DNA sequence
   	e.	transcribe DNA into mRNA transcripts

4 points

QUESTION 8

1. In gene therapy, what is transferred into an individual’s chromosomes?

   	a.	a mutated gene
   	b.	an unmutated gene
   	c.	DNA libraries
   	d.	a new genome
   	e.	bacterial plasmids

4 points

QUESTION 9

1. The technique of ____ analyzes 500,000 SNPs in an individual's genome.

   	a.	DNA cloning
   	b.	SNP-chips
   	c.	cutting and pasting
   	d.	electrophoresis
   	e.	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.	glyphosphate
   	b.	Golden Rice
   	c.	A. tumefaciens corn
   	d.	Bt corn and soy
   	e.	Ti corn and rice