Final Exam

Question 1

which of the following situations will lead to natural selection

Answer 1

all of the above

Question 2

what is the difference between micro - & macroevolution

Answer 2

micro - describes population

macro - describes over time

Question 3

population genetics is the study of what

Answer 3

how allele frequencies in a population change over time

Question 4

individuals from islands fly to the other to stay. This can alter after the allele frequencies of the population through which of the following mechanisms

Answer 4

gene flow

Question 5

which of the following pairs do both evolutionary processes introduce new genetic variation into a population

Answer 5

mutation & gene flow

Question 6

the wing of a bird & the arm of a human are examples of what

Answer 6

homologous structures

Question 7

the fact that DNA sequences are more similar in more closely related organisms is evidence of what

Answer 7

descent with modification

Question 8

which situation would most likely lead to allopatric speciation

Answer 8

a flood causes the formation of a new lake

Question 9

which variable increases the likelihood of allopatric specification taking place more quickly

Answer 9

longer distances between divided groups

Question 10

what process in the human life cycle results in the production of gametes

Answer 10

meiosis

Question 11

what is a specific segment on DNA that directs protein syntheses

Answer 11

gene

Question 12

which scientific concept did Charles Darwin & Alfred Wallace independently discover

Answer 12

natural selection

Question 13

which of the following is true regarding interphase

Answer 13

it is the longest phase of cell division

Question 14

during which phase of the cell cycle does growth occur

Answer 14

interphase

Question 15

what structure dissolves so that the sister chromatids can move to the opposite ends of the cell during cell division

Answer 15

centromere

Question 16

which type of cell division is responsible for the repair of your skin following a sunburn

Answer 16

mitosis

Question 17

during which phase of mitosis would you expect to see chromosomes consisting of two chromatids within the nucleus

Answer 17

prophase

Question 18

during which phase of mitosis do spindle fibers pull the chromosomes to opposite poles of the cell

Answer 18

anaphase

Question 19

how many chromosomes pairs would be shown in a normal human karyotype

Answer 19

23

Question 20

which of the following is not associated with mitosis

Answer 20

production of sperm

Question 21

which of the following is a result of meiosis

Answer 21

half the # of chromosomes in the daughter cells

Question 22

how many nuclear divisions occur during meiosis

Answer 22

2

Question 23

when does the reduction in chromosome numbers occur

Answer 23

anaphase II

Question 24

crossing over results in

Answer 24

new genetics combinations

Question 25

nondisjunction in the female could lead to which of the following

Answer 25

all of the above

Question 26

molecules that store & process genetic info. are

Answer 26

nucleic acids

Question 27

a nucleotide consist of

Answer 27

a 5 carbon sugar / nitrogenous base / phosphate group

Question 28

the structure of RNA differs from DNA in that

Answer 28

the backbone of RNA contains ribose

Question 29

nucleotides have a nitrogenous base attached to a sugar at the

Answer 29

1' carbon

Question 30

which of the following nitrogenous bases is NOT found in DNA

Answer 30

uracil

Question 31

which of the following does cytosine pair with

Answer 31

guanine

Question 32

eukaryotes contain a WHAT chromosome

Answer 32

double - stranded circular

Question 33

a diploid cell has __ the number of chromosomes as a haploid cell

Answer 33

twice

Question 34

an organisms traits are determined by the specific combination of inherited

Answer 34

genes