Bio Lab Chapter 14
Terms
undefined, object
copy deck
- 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