Biology Lecture Test Chapters 11 12 17

Front 1

who proposed the law of independent assortment

Back 1

mendel

Front 2

mendels theory of independent assortment states that

Back 2

each hereditary unit is inherited separately from other hereditary units

Front 3

what is the type of inheritance that suggests the concept of blending called

Back 3

codominance and incomplete dominance

Front 4

genes at one locus that affect the expression of genes at a different locus are said to be

Back 4

linked

Front 5

a gene that produces multiple effects is called

Back 5

an epistatic gene

Front 6

genetic recombination as a result of crossing over occurs more readily in genes

Back 6

located far apart on the same chromosome

Front 7

a bell shaped curve of phenotypic variation is indicative of

Back 7

continuous variation

Front 8

chromosomes other than thoes involved in sex determination are known as

Back 8

autosomes

Front 9

the human X chromosome is found ___________ and carries _________ genes than the Y chromosome & __________________________

Back 9

is found in females and males carries different genes than the Y chromosome & synapses in a small region with a Y chromosome during meiosis

Front 10

karyotyping involves taking pictures of chromosomes during

Back 10

metaphase

Front 11

in an autosomal dominant disorder such as huntington disease two parents with the gene have the probability of passing it onto ____________% of their children

Back 11

75%

Front 12

an autosomal recessive disorder is more _________ in ________ than in ____________

Back 12

is more frequent in males than females

Front 13

with respect to chromosomes the difference between normal human males & females is defined by what

Back 13

males possess an X & Y chromosome

Front 14

an X-linked carrier is a: homozygus female, heterozygous male or heterozygous female

Back 14

heterozygous female

Front 15

males tend to be affected in greater numbers by X linked recessive genetic disorders than females because

Back 15

males have only 1 X chromosome

Front 16

what is the normal human male chromosome look like

Back 16

XY

Front 17

what is the normal human female chromosome look like

Back 17

XX

Front 18

in a pedigree chart a male showing the specific trait being studied is indicated by a darkened square or circle

Back 18

darkened square

Front 19

a gene mutation is a _____________________, may be caused by _____________, may arise ____________, and can occur in___________.

Back 19

is a change in the nucleotide sequence of DNA may be caused by environmental agents may arise spontaneously and can occur in any organism

Front 20

mutations can be

Back 20

random beneficial lethal & heritable

Front 21

what would be considered a carrier of a sexlinked recessive defect

Back 21

the normal daughter whos father had the defect

Front 22

if a daughter expressed an X linked recessive gene she inherited the trait from her

Back 22

her mother

Front 23

a chromosomes gene sequence that was ABCDEFG before modification and ABCDCDEFG afterward is an example of

Back 23

duplication

Front 24

a chromosomes gene sequence that was ABCDEFG before damage and ABFEDCG after is an example of

Back 24

inversion

Front 25

the failure of chromosomes to spearate during meiosis is called

Back 25

nondisjunction

Front 26

the great chain of being was sritten by

Back 26

aristotle

Front 27

scientists began to question the perfection of the chain of being because of

Back 27

the presence of body parts with no apparent function in some organisms

Front 28

large flightless longnecked birds

Back 28

are native to 3 continants inhabit dry open grasslands closely resemble each other in morphology & behavior & illustrate a biogeographic distribution pattern

Front 29

the oldest fossils are found in what are of the ground

Back 29

the deepest

Front 30

the value to darwin of lyells ideas on the geologic history of the earth was the

Back 30

enormous lengths of time required for geologic events

Front 31

thomas malthus proposed that

Back 31

the population increased faster than the food supply

Front 32

which of the following organisms would most likely be fossilized: squid, poo, or a trilobite

Back 32

a shelled arthropod such as a trilobite

Front 33

the time it takes fro half of a radioisotopes atoms to decay is called its

Back 33

half life

Front 34

the large ancient land mass that contained all the continents is called

Back 34

pangea

Front 35

body parts inherited from a common ancestor are ________ structures

Back 35

homologus

Front 36

the wings of a bird and the wings of a butterfly are __________ & show morphological _________

Back 36

analogous convergence

Front 37

new combinations of genes may be produced by

Back 37

independent assortment mutation crossing over & reproduction

Front 38

what does not characterize a population in genetic equilibrium

Back 38

selected reproduction

Front 39

the hardy weinberg formula is valuable for the calculation of changes in

Back 39

allele frequencies

Front 40

the genetic equilibrium of a population can be upset by all except what

Back 40

random mating

Front 41

if the frequency of a recessive gene in a population under genetic equlibrium is 40% in the next generation the frequency of that gene would be

Back 41

40%

Front 42

the impact of natural selection is demonstrated by

Back 42

directional selection stabilizing selection and disruptive selection

Front 43

directional selection occures when

Back 43

the organisms on one extreme of the population have a better chance to survive than thoes on the other extreme

Front 44

stabilizing selection occures when

Back 44

the extremes of the population have a lesser chance to survive