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What is a well supported, testable explanation of phenomena that have occurred in the natural world?
Theory
How are cancer cells different from normal cells?
Cancer cells have lost their ability to control their rate of growth and cell division.
Why is do cells divide before they become too large?
Large cells place more demands on DNA, the cell has trouble moving enough material in and out of the cell membrane
What is the result of mitosis?
Two genetically identical cells result from mitosis.
What happens during metaphase of mitosis?
The chromosomes line up in the middle of the cell.
What does the term genotype mean?
The genetic makeup of an organism, represented by letters.
Give an example of a heterozygous genotype.
Xx
Give an example of a homogenous genotype.
XX or xx
How many chromosomes do normal human somatic cells have?
46
What is incomplete dominance?
When one allele is not completely dominant over another, so that the resulting phenotype is a blend.
When does crossing over occur?
Prophase 1 of Meiosis
How many sets of chromosomes does a gamete have?
one set (23 total chromosomes)
Describe nondisjunction and when it occurs.
Chromosomes fail to separate during anaphase 1 or 2 of meiosis.
How many and what type of cells result from meiosis?
4 genetcially different cells
What is the meaning of the term "diploid"?
A cell with two sets of chromosomes--one from each parent.
List three things required for evolution to occur.
Variation in the population, Genetic mutations/adaptations, Competition in the population
