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Chp 3

The science of Heredity

QuestionAnswer
Heredity The passing of traits from parents to offspring.
Trait A specific characteristic that an organism can pass to its offspring through its genes.
Genetics The scientific study of heredity.
Fertiization The process by which cells release energy by breaking down food molecules without using oxygen.
Purebred an offspring of many generations that has the same form of a trait.
Gene A sequence of DNA that determines a trait and is passed from parent to offspring.
Allele The different forms of a gene.
Dominant Allele An allele whose trait always shows up in the organism when the allele is present.
Recessive Allele An allele that is hidden whenever the dominant allele is present.
Hybrid An offspring of crosses that has two different alleles for a trait.
Probability A number that describes how likely it is that a particular event will occur.
Punnett square A chart that shows all the possible combinations of allele that can result from a genetic cross.
Phenotpe An organism's physical appearance, or visible traits.
Genotype An organism's genetic makeup, or allele combinations.
Homeozygous Having two identical alleles for a particular gene.
Heterozygous An organism that cannot make its own food and gets food by consuming other living things.
Created by: user-1897006
 

 



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