Lab 7 Flashcards
ploidy
refers to number of sets of chromosomes an organism’s cells have
ploidy of cell with 1 set of chromosomes
haploid (1N)
ploidy of cell with 2 sets of chromosomes
diploid (2N)
advantage of diploid cells
if 1 copy is defective, still a functional copy
ploidy of cell with 4 sets of chromosomes
tetraploid (4N)
mitosis
1 cell produces 2 daughter cells with same ploidy and number of chromosomes
meiosis
1 cell produces 4 daughter cells with 1/2 the number of chromosomes
produces spores
rhizomes (underground stems)
can send up new shoots (asexual reproduction)
meristems
on leaf edges, make plantlets
roots
can send up new shoots (suckers)
stolons/runners
can develop plantlets at nodes (asexual reproduction)
gemmae fragments
produce new liverworts (asexual reproduction)
describe/diagram sexual reproduction
a 2N sporophyte goes through meiosis to produce 4 1N spores
spores go through mitosis to produce 1N multicellular gametophyte
multicellular gametophyte goes through mitosis to create a haploid gamete
2 gametes go through fertilization to produce a 2N zygote
zygote goes through mitosis to produce 2N multicellular sporophyte
sporophytes make __________ in ___________
spores, sporangia
gametophytes make __________ in __________
gametes, gametangia
gametophyte in moss
main green leafy moss
sporophyte in ferns
main plant, makes spores under leaves
sporophyte in flowering plants
main plant
male gametophyte in flowering plants
pollen grains made in anthers of flowers
female gametophyte in flowering plants
stay in ovary, make an egg
where do fruits develop from?
ovary of flowers
