Cell Cycle Control System - Law of independent assortment

what is a cell cycle control system made up of

set of molecules

what does a cell cycle control system do

triggers and coordinates key events in the cell cycle

what is the cell cycle control system analogous to

the time dial of a washing machine

how many check points are in a cell cycle control system

3

what does the first check point in a cell cycle control system do and what is it called

G1, go ahead or stop (checks chromatin)

what does the second check point in a cell cycle control system do and what is it called

G2. into M phase (mitosis begins)

what does the third check point in a cell cycle control system do and what is it called

M, onset of anaphase (kinetochore is in right place)

life cycle of an animal cell

mitosis vs meiosis

interphase cell in meiosis

what is different in a cell in interphase in meiosis

homologous pairs
one from each parent
genes for some character at corresponding loci
chiasmata
points where strands hold together

define cross over

reciprocal exchange of genetic material between non-sister chromatids

cell in prophase 1 (meiosis)

cell in metaphase 1 (meiosis)

how to homologous pairs arrange themselves in metaphase 1

independent of each other (equal parts on each side of the plate)

cell in anaphase 1

cell in telophase and cytokinesis meiosis

cell in prophase 2

in what phase do spindles form

prophase 2

cell in metaphase 2

cell in anaphase 2

cell in telophase 2 and cytokinesis

what is the result of telophase 2 and cytokinesis

four daughter cells

what experiment did Gregor Mendel do (1857)

grew peas at a monastery in Europe

what did Gregor Mendel study

inheritance

in dom and recessive traits what is controlled breeding

when plants are one or the other

what were the steps Gregor Mendel did in his experiment

1. removed stamens from purple
2. pollen from white to purple
3. carpel developed into pod
4. planted resulting seed
5. examined off spring

what is the law of segregation

alleles account for variation
an organism inherits two alleles for each character
allele is dominate when expressed in the heterozygous state
the two alleles for each character seperate during meiosis

where do they two inherited alleles come from

each parent

what is the locus

specific location of a gene on a chromosome

what allele is not expressed in the heterozygous state

recessive

how many likely combiantions will there be for any given fusion between gametes

4

what is genotype

resulting alleles

what is phenotype

expression of these alleles

what did mendel originally try to work on

mice

what is the law of independet assortment

each pair of alleles segregates themselves independently during gamete formation

what is each character determined by

one gene, two alleles

is one character always dominant to the other

no