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
