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45 Cards in this Set

  • Front
  • Back

Null hypothesis

Nothing happens, no significant change.

Alternative hypothesis

The opposite of original hypothesis

Scientific method

1) observation


2) form a question


3) form a hypothesis


4) conduct an experiment


5) analyze the data and draw a conclusion

Base

Substage light

Fine focus knob

Coarse focus knob

Arm

Objective lense

Revolving nose piece

Body tube

Eye piece

Condenser

Iris diaphragm

Mechanical stage

Interphase

Part of cell cycle where no division occurs


Consists of G1, S, & G2

G1

First growth phase

S phase

Everything is copied


DNA synthesis

G2

Health and activity

M phase

Part of cell cycle where division occurs


Consists of mitosis and cytokenises

Mitosis

Division of the nucleus whereby each daughter cell receives the same compliment of DNA that the parent cell possesed

Cytokenises

Actual splitting of the cell

Prophase

Nucleus disappears and the mitotic spindle apparatus forms


4 chromosomes present


Replicated chromosomes


8 chromatids


Diploid cell

Metaphase

Chromosomes line up down the middle and attached to the spindle fibers at the centromere


4 chromosomes present


Replicated chromosomes


8 chromatids present

anaphase

Chromatids split from each other and become individual chromosomes


Unreplicated chromosomes


8 chromosomes present


0 chromatids present

Telophase

The nuclei reform and the cell starts to split


2 nuclei in the cell


8 chromosomes


0 chromatids

Prophase

Metaphase

Anaphase

Telophase

Chromosome

Long threadless DNA molecule found in nucleus

Sister chromatids

When two chromosomes are together they are sister chromatids

Centromere

Place where the pair of homogenous duplicated chromosomes are attached

Microtubules

Spindle fibers

Cell plate

Precursor to cell wall

Somatic cell

Any cell of a living organism other than the reproductive cells

Gamete

Mature happiness male or female German cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote

Zygote

Diploid cell resulting from the fission of two haploid gametes

Ploidy

Number of sets of chromosomes in a certain or in the cells of an organism

Synapsis

Homologous chromosomes pairs in meiosis I

Haploid

n=1 complete sets of chromosomes

Diploid

2n=2 complete sets of chromosomes

Homologous recombinatiom

Crossing over

Recombinant chromosome

Chromosome with genes from the other chromosome

Independent assortment

The Homologous pairs can switch with each other