Lab Exam 2 Flashcards
The position along the length of a chromosome where a gene is located
locus
Different forms of genes are called _________.
alleles
Humans diploid (2N) chromosome number is ___
46
point where the arms of chromatids crossover one another
chiasma
physical appearance of an organism in regards to traits
phenotype
genes present in an organism
genotype
stretch of nucleotides along the length of a chromosome that code for protein or sometimes an RNA molecule
gene
Female flies are smaller or larger than males?
larger
Male flies have _____ ______ on their forelimbs
Sex combs
Two ends of a strand are polar or nonpolar?
Polar
Standard names for each end of a DNA strand.
5’head and 3’tail
Percentage in DNA: cytosine= adenine= guanine= thymine=
20% 30% 20% 30%
3 major branches of life
Eukaryotes, archaea, and eubacteria
Tree which depicts the evolutionary relationships among organisms.
Phylogeny
Bacteria and archea have a ____________ cell type.
Prokaryotic
Autotrophs use _________ carbon, and either _______ or chemicals as energy sources
inorganinc, light
Heterotrohs use orgainc _______ to fuel metabolism.
carbon
Two types of heterotrophs
Chemoheterotrohs and photoheterotrophs
Bacteria that are:
obligate aerobes require _______
obligate anaerobes are poisoned by ________, and use fermentation or anaerobic respiration to produce ATP
faculative anaerobes ___________
oxygen, oxygen, can do both
If both organisms benefit from the assocoation , the relationship is ____________.
If one benefits and the other is unaffected, the relationship is ____________.
If one benefits and the other is harmed, the relationship is ______________.
mutualistic, commensalistic, parasitic
Theory that accounts for the origin of mitochondria and chloro[lasts in eukaryotic cells.
Cellular endosymbiosis
3 basic bacterial shapes are:
_________(round)
_________( rod shaped)
__________(Spiral shaped)
coccus, bacilus, spirillium
Prefixes in bacterial cell shapes.
_________ ( a chain of cells)
________( a cluster of cells)
________(a pair of cells)
Strepto-, staphylo-, diplo-
Bacteria thats has a thick peptidoglycan cell wall outside an internal membrane react positively to Gram staining.
Gram positive
Bacteria that have a thin pepitdoglycan cell wall sandwiched between outer and inner membranes are relatively inaccesible to to Gram stains.
Gram negative
5 main groups of the domain bacteria (eubacteria or ‘true’ bacteria)
Proteobacteria, chlamydias, spirochetes, cyanobacteria, gram-positive bacteria
One of the domain bacteria groups that:
are Gram negative
most members are anaerobic
includes nitrogen-fixing bacteria
Proteobacteria
One of the domain bacteria groups that:
Gram negative
are parasites that must live in animals
many are disease causing
Chlamydias
One of the domain bacteria groups that:
are spiral shaped cells that move in a corkscrew motion
includes free living and parasitic species
Spirochetes
One of the domain bacteria groups that:
are oxygen-producing photosynthtic prokaryotes
a.k.a. blue-green algae
Cyanobacteria
One of the domain bacteria groups that:
contain members that are free-living soil-born species that are non-pathogenic
contain members that are disease-causing and anti-bacterial producers
Gram-Positive Bacteria
The domain that:
loves ‘extreme’ enviroments
can be found in the gut of animals, sediments of ponds, and some produce methane gas
most are heterotrophic but some are chemoautotrohs
Domain Archaea
4 kingdoms part of the domain Eukarya
Protista, fungi, plantae, animalia
What domain?
Domain Eukarya
5 supergroups (lineages) of domain eukarya
Excavata, chromalveolata, archaeplastida, rhizaria, unikonta
In the domain Eukarya, of the main two lineages, the fused gene is present in all _______, while the two genes are separate in the ________.
bikonts, unikonts
Eukaryotic supergroup that:
are single celled orgainsims
have excavated groove on side of the cell
conatains parasitic members and photosynthetic members
Supergroup Excavata
Phylum of supergroup excavata that:
single celled with reduced, nonfuntional mitochondria
does’t need oxygen for energy
have multple nuclei and multiple flagella
have mutualistic, commensalistic, and parasitic associations
can cause STDs
Phylum Metamonada (diplomonads and parabasilids)
Phylum of supergroup excavata that:
are single celled with two flagella and functional mitochondria
have variety of nutritional modes
most are photosyntheitc aqautic oraganisms but some are kinetoplatids that can cause disease
Phylum Euglenozoa (Euglenids, kinetoplastids)
Supergroup of domain eukarya that:
contain many important algae species that serve as primary producers in aqautic ecosystems
Supergroup Chromalveolata
Phylum of supergroup Chromalveolata that:
are single celled heterotrphs or mixotrophs that are important to phytoplankton components
cell body is reinforced by cellulose plates
some are endosymbionts critical to marine animals, while others form massive growths called blooms
Phylum Dinoflagellata (Dinoflagellates)
Phylum of supergroup Chromalveolata that:
are single celled intracellular parasites of an animal cells
many cause serious diseases
many contain vestial chloraplast-like structure called apicoplast
Phylum Apicomplexa (Apicomplexans)
Phylum of supergroup Chromalveolata that:
are single celled organisms with large complex cells having cilia on the outer surface
aquatic organisms forming symbiotic relationships pr parasites
Phylum Ciliophora
Phylum of supergroup Chromalveolata that:
are large comple algae found along rocky coastlines
body differentiated into a holdfast, stipe and blade
Phylum Phacophyta (Brown algae)
Phylum of supergroup Chromalveolata that:
are freshwater and marine algae with characteristic golden-colored pigments
are phototrophic and mixotrophic
Phylum Chrysophyta (Golden algae)
Phylum of supergroup Chromalveolata that:
contribute as much as 50% of the ocean’s primary activity of phytoplankton component
contain marine and fresh water species
often present in large numbers in water
Phylum Bacillariophyta (Diatoms)
Phylum of supergroup Chromalveolata that:
are sometimes called water molds but most species are terrestrial
similar to fungi
attain nutritionn by decompostion and absorption
Phylum Oomycota (Oomycetes)
Supergroup of domain Eukarya that:
contains single celled, filamentous, colonial, and multicellular photoautotrophs that are primary producers in aquatic and terrestrial ecosystems
Includes land plants
Supergroup Archaeplastida (Red algae, green algae, charophytic green algae, Land plants)
What Phylum of supergroup Archaeplastida?
Phylum Rhodophyta (Red algae)
What Phylum of supergroup Archaeplastida?
Phylum Rhodophya (Red algae)
What Phylum of supergroup Archaeplastida?
Phylum Chlorophyta (Green Algae)
What Phylum of supergroup Archaeplastida?
Phylum Charophyta
What Phylum of supergroup Archaeplastida?
Land Plants
Type of vascular tissue in land plants that conduct water and dissolved minerals is called _________.
Type of vascular tissue in land pants that conduct a variety of substances, including carbohydrates is called ________.
xylum
phloem