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24 Cards in this Set

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A change in a gene or chromosome.
Mutation
The process that occurs in sex cells by which the number of chromosomes is reduced in half.
Meiosis
A chart that shows all the possible combinations of alleles.
Punnett Square
The likelihood that a particular event will occur.
Probability
An allele that is masked when a dominate allele is present.
Recessive Allele
His work was the foundation for understanding why offspring have traits similiar to their parents.
Gregor Mendel
He was the first scientist to use probability to interpret his data.
Gregor Mendel
An organism that has two DIFFERENT alleles for a trait.
Hybrid
An allele whose trait always shows up in the organism when the allele is present.
Dominant Allele
RNA that copies the coded message from DNA in the nucleus and carries the message into the cytoplasm.
Messenger RNA
RNA in the cytoplasm that carries amino acid to the ribosome and adds it to the growing protein chain.
Transfer RNA
An organism's physical apperance, or visible traits.
Phenotype
An organism's genetic makeup.
Genotype
According to this theory, genes are carried from parents to their offspring on chromosomes.
Chromosome Theory of Inheritance
Having two identical alleles for the same trait.
Homozygous
A condition in which neither of the two alleles of a gene are dominant or recessive.
Codominance
The passing of traits from parent to offspring
Heredity
What an organism can pass on to its offspring through its genes
Trait
Having two different alleles for a trait.
Heterozygous
A segment of DNA on a chromosome that codes for a specific trait.
Gene
An organism that always produces offspring with the SAME from of a trait as the parent.
Purebred
Having two diffeent alleles for a trait.
Heterozygous
Different forms of a gene
Alleles
Living thing
Organism