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42 Cards in this Set

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what is the purpose of meiosis?
produce haploid cells
meiosis occur in the:
___ for humans
___ for plants
gonads (testes and ovaries)
sporophytes
homologous chroms. code for the same ___ as another
trait
"joining" of chroms. in prophase I
synapsis
pair of synapsed homo. chroms.
tetrad
exchange of genetics material between non-sister chromatids
crossing over
Division I
diploid->haploid
gametes
reproductive cells
gametogenesis
formation of gametes
spermatogenesis
the formation of sperm cells
oogenesis
the formation of egg cells
tightly coiled tubes that make up male testes
seminifurous tubules
diploid cells that are packed on the inner walls of testes
spermatogonia
some daughter cells called ___ move to the lumen and begin meiosis
primary spermatocytes
meiosis I splits primary into ___
secondary spermatocytes
spermatids mature and differentiate into ___ cells a they move along the length of the tubule
sperm
oogenesis occurs in the ___ of females
ovaries
cells that produce female gametes are called ___
oocytes
oocytes are not produced ___
continually
during fetal development, ___ are produced in the ovaries
oogonia
at birth the primary oocytes have begun ___ but are arrested in ___
meiosis I, prophase I
___ converts spermatids into ___
spermiogenesis, spermatozoa
immature sperm go to the ___ of the testes where they mature
epididymis
prior to ___oocytes complete meiosis I
ovulation
product of ovulation is one haploid secondary oocyte (arrested in ___) and one haloid polar body (oocyte gets majority of cytoplasm)
metaphase II
secondary oocyte housed within ___ of the ovary
follicle
oocyte expelled from ___ during ovulation
Graafian follicle
when ___ is penetrated by sperm cell, meiosis II proceeds to completion
ovum(oocyte)
secondary oocyte divides and result is ___
second polar body, egg
adult plant
diploid sporophyte
houses reproductive structures in plants
flower
male structure of plants is comprised of __ and ___
stamens, filament, anther
___ is where sporogenesis occurs in plants
anther
anther houses ___ cells
microspore mother cells
microspores differentiate into ___ (replaces swimming sperm)
pollen grains
female reproductive site is comprised of ___
carpel (pistil), stigma, style, ovary
ovule holds a ___ cell
diploid megaspore mother cell
___ megaspores disentegrate, leaving one viable
3
megaspore will undergo mitosis to ultimately form the ___ sac that house the haploid egg cell
embryo
what are the differences between the phases in meiosis?
prophase I- crossing over occurs
in the I phases, pair of chromosomes split; in the II phases, pairs of chromatids split
the interval between meiosis I and meiosis II
interkinesis
what are the differences between meiosis and mitosis?
-mitosis can occur in either haploid or diploid cells and is nessecary for cell production and growth
-meiosis occurs only in diploid cells and it role is to produce cells with a reduced number of chromosomes and shuffle the genetic material so an organism can reproduce sexually