What aspect of Lamarck's ideas about evolution was incorrect?
He believed that acquired characteristics could be passed on from parent to offspring.
What happens during metaphase of mitosis?
The chromosomes line up in the middle of the cell.
Give an example of a homogenous genotype.
XX or xx
Define ecology.
branch of biology that deals with the interactions among organisms and their environments
What happens during each of the following phases of interphase: G1, S, and G2?
G1- cell growth
S- DNA synthesis
G2- prepare for mitosis
How is meiosis 1 different from meiosis 2?
Interphase occurs before meiosis 1, but does not occur before meiosis 2.
Why are fossil fuels nonrenewable?
They form over millions of years.
Define behavior.
The way an organism reacts to stimuli in its environment.
How many and what type of cells result from meiosis?
4 genetcially different cells
What is the probability that 2 heterozygous parents will have a homozygous offspring?
50%
Compared to complete dominance, how do co-dominant alleles affect the phenotypes of organisms?
They increase the number of different phenotypes that are possible.
What does the term genotype mean?
The genetic makeup of an organism, represented by letters.
Describe the greenhouse effect.
This is when gases in the atmosphere build up and act as a blanket to the earth, preventing heat from escaping into outer space.
How many sets of chromosomes does a gamete have?
one set (23 total chromosomes)
List the three domains in our current classification system.
Eukarya, Archea, Bacteria
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.
When does crossing over occur?
Prophase 1 of Meiosis
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
Describe nondisjunction and when it occurs.
Chromosomes fail to separate during anaphase 1 or 2 of meiosis.
What is the meaning of the term "diploid"?
A cell with two sets of chromosomes--one from each parent.
Explain what a cladogram is and how organisms are organized onto it.
A cladogram is a diagram that shows the evolutionary relationships among organisms; they're plotted as branches based on derived characteristics that are shared
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