Final Lab Quiz For Dr. Steele Population Evolution

Front 1

law of segregation

Back 1

when any individual produces gametes, the copies of a gene separate so that each gamete receives only one copy of genetic information.

Front 2

law of independent assortment

Back 2

each member of a pair of homologous chromosomes separates independently of the members of other pairs so that the results are random.

Front 3

gene

Back 3

a hereditary unit consisting of a sequence of DNA that occupies a location ona chromosome and determines a particular charecteristics in an organism.

Front 4

chromosome

Back 4

a threadlike strand of DNA and associated proteins in the nucleus of eukaryotic cells that carries genes.

Front 5

sister chromatid

Back 5

either of the two daughter strands of a replicated chromosome that are joined by a single centromere and separated during cell division to become individual chromosomes.

Front 6

centromere

Back 6

the region of the chromosome to which the spindle fiber is attached during the cell division .

Front 7

homologous chromosome

Back 7

two chromosomes, one of paternal origin ,the other maternal origin. that are identical in appearance and pair during meiosis.

Front 8

autosomal trait

Back 8

any trait determined autosomal genes. autosome- any chromosome other than sex chromosomes.

Front 9

during what phase of mitosis does replication of DNA occur?

Back 9

Interphase S

Front 10

during what phase of mitosis does the cell check to make sure all pairs of chromatids are connected to spindle fibers emanating from each pole?

Back 10

metaphase- early Anaphase

Front 11

chiasmata

Back 11

hold chromosomes together during crossing over.

Front 12

x

Back 12

age class

Front 13

Nx

Back 13

number of individuals alive at time x

Front 14

lx

Back 14

age specific survivorship
lx=Nx/N0

Front 15

Dx

Back 15

# of individuals that die during an age interval. Nx-Nx+1

Front 16

Qx

Back 16

age specific mortality rate
Qx=Dx/Nx

Front 17

Lx

Back 17

average # alive at between time x and x+1.
Lx=Nx+nx+1/2

Front 18

Mx

Back 18

fecundity, or # of offspring produced per female in the population

Front 19

R0

Back 19

net replacement rate of teh population
summation(lx)(Mx)

Front 20

Tx

Back 20

for each X, the successive sum of the Lxs
Tx=sum of Lx

Front 21

ex

Back 21

life expectancy. or mean expectancy of living to a certain age. Tx/Nx

Front 22

klinotaxis

Back 22

Organism has a single receptor; compares intensity of stimulus on either side by lateral deviation of its body
direct

Front 23

Tropotaxis

Back 23

comes about by comparing response from paired receptors on either side of the body to determine where the stimulus is strongest
direct

Front 24

transverse orientation

Back 24

a behavior when the organism orients itself at an anlge between 0 and 180 deg with respect to stimulus
direct

Front 25

light reaction

Back 25

organism orients itself so light is directly above or directly below
direct

Front 26

orthokinesis

Back 26

speed or frequency of locomotion depends on stimulus

Front 27

Klinotaxis

Back 27

degree of turning relates to strength of stimulus.

Front 28

fixed action pattern

Back 28

specific corrdinated set of muscle movements that once initiated by stimulus run to completion.

Front 29

sign stimulus

Back 29

specific stimulus that releases a fixed action pattern.

Front 30

habituation

Back 30

a type of learning in which repeated exposure to stimulus results in a warning of responsiveness.