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23 Cards in this Set

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Chromosome

Long continuous thread of DNA that consists of numerous genes along with regulatory information.

Histone

The protein that a chromosome is associated with.

Chromatin

Loose combination of DNA and proteins.

Chromatid

One half of a duplicated chromosome.

Centromere

Where the sister chromosomes are held together.

Telomere

Repeating nucleotides at the end of DNA molecules that do not form genes. They prevent chromosomes from accidentally touching eachother.

Prophase

Chromatin condenses into chromosomes, each one consists of two sister chromatids.

Metaphase

Chromosomes allign at the equator of the cell.

Anaphase

Sister chromatids seperate. Spindle fibers pull them from center to the outside of the cell on opposite sides.

Telophase

Nuclear membrane forms, cell starts to split.

Growth Factors

A broad group of proteins that stimulate cell division.

Apoptosis

Programmed cell death.

Cancer

Uncontrolled cell division.

Benign Tumor

Cells remain clustered together.

Malignant Tumor

Cancer cells break away or metastasize from the tumor.

Carcinogens

Subastances known to promote the development of cancer.

Homologus Chromosomes

Two chromosomes, one from the mother, one from the father, that have the same length and general appearence.

Meiosis

A form of nuclear divison that divides a diploid cell into a haploid cell.

Meiosis I

Produces two haploid cells with duplicated chromosomes.

Meiosis ll

Produces 4 haploid cells.

Gametogenesis

Production of gametes.

Polar Bodies

Cells eventually broken down.

Purebread

Genetically Uniform