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what is meiosis?
what is the prurpose of meiosis?
what do cells preparing to divide undergo?
cells pre paring to divide by meiosis undergo the G1, S and G2 stages...
what is one difference between meiosis and mitosis?
how can meiosis be summarized?
whay do varitations exist?
variations exist due to the farmation of a tetrad, synapsis, and crossing over.
what are 3 events that happen in prophase 1?
what is a tetrad formed?
what happens during synapsis?
what happens during crossing over?
segments of the chromatids may break off and attach to an adjacent chromatid on the homologous...
what does crossing over cause?
what leads to genetic variation?
what happens in metaphase 1?
the tetrads line up randomly along the equator.
what do the spindle fibers do in metaphase 1?
What happens in anaphase 1?
Eahc homologous chromosme move to opposite poles .
what separates in anaphase 1?
What actually separates during anaphase I of meiosis is the chromosomes separate, not the chromatids.
what is independent assortment?
what does independent assortment lead to?
Independent assortment leads to additional genetic variation.
what happens in Telophase 1 and cytokenisis 1?
the chromosomes reach opposite poles and the cytoplasm divides
what do the daughter cells produced at the end of meiosis have?
what happens in prophase 2?
The spindle startes to form.
what happens in metaphase 2?
what happens in anaphase 2?
Waht happens in telophase 2 and cytokinesis 2?
what are the final results of mieosis are?
The final result are 4 haploid cells that are not genetically identical
what is spermatogenesis is?
spermatogenisis is sperm production.
what happens in spermatogenesis?
what does the cytoplasm determin in the number of functional gametes?
The division of the cytoplasm determines the number of functional gametes procuded because...
what do spermatids devolope into?
Spermatids develop into a mature sperm cell
what is oogenesis?
Oogenisis is egg production.
What happens in oogenesis?
what does the division of the cytoplasm determine in the number of functional gametes?
what does the ootid devolope into?
why does the egg need extra cytoplasm?
what are the other 3 cells called?
the three other cells produced by oogenesis are called polar bodies
what happens to the other 3 cells?
To these cells, they will eventually degenerate
what is reproduction?
what are the two types of reproduction?
Asexual and sexual reproduction.
what is asexual reproduction?
how many parents are involved in asexual reproduction?
how do the offspring and parent compare in asexual reproduction?
what is the first form of asexual reproduction?
Fission, it occurs when a unicellular organism replicates its genetic material and splits in...
what is the second form of asexual reproduction?
Budding, growth of a small reproductive fragment from a parent organism and an example is yeast.
what is the third form of asuexual reproduciton?
Spore, a spore is a reproductive cell that is covered by a hard coat and an example is molds...
what is the 4th form of asexual reproduction?
Vegetative propagation, is asexual reproduction in plants and an example is planting potato...
what is sexual reproduction?
what gametes does sexual reproduction require?
what is fertilization?
what is a zygote?
how are the offspring of sexual reproduction genetically different?
The 2 sources that make the offspring of sexual reproduction genetically different from their...
what do all offspring of sexual reprduction contain?
they contain their oun unique genetic combination.
what do each gamete have?
each gamete has a unique combination and then combines with another gamete from a completely...
what is the advantage of sexual reproduction?
what is an example of this?
a dieseas that strikes a crop of grain.
what happens in the disease that strikes a crop of grain?
A few plants have a genetic varitation that makes them resistant to disease. although many...