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Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Heredity   The passing of traits from parents to offspring  
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Hybrid   An organism that has two different alleles for a trait  
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Purebred   The offspring of many generations that have the same traits  
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Trait   A characteristic that an organism can pass on to its offspring through its genes  
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Offspring   The children of an organism.  
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Gene   The set of information that controls trait  
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Alleles   The different forms of genes  
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Recessive Allele   An allele that is masked when a dominant allele is present  
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Homozygous Alleles   Having two identical alleles for trait  
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Heterozygous Alleles   Having two different alleles for trait  
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Genotype   an organism's makeup,or allele combination  
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Phenotype   An organism's physical appearance,or visible traits  
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Dominant Alleles   An allele whose trait always shows up in the organism when the allele is present  
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Punnett Square   A chart that shows all the possible combinations of alleles that can result from genetic cross.  
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Codominance   Alleles are neither dominant nor recessive.AS a result both alleles are expressed in the offspring  
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Probaility   A number that describes how likely it is that an event will occur.  
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Meiosis   The process that occurs in the formation of sex cells by which the number of chromosomes is reduced by half.  
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Haploid   Half a chromosome  
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Diploid   two complete sets of chromosomes,one from each parent  
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Chromosome   A doubled rod of condensed chromatin.  
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Pedigree   A chart that tracks which members will have a particular trait  
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Genetic Disorder   An abnormal condition that a person  
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Sex-Linked Genes   A gene that is carried on the X or Y chromosome  
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Sex Chromosomes   A pair of chromosomes carrying genes that determine whether a person is male or female  
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Inbreeding   A selective breeding method in which two individuals with identical or similar sets of alleles are crossed  
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Hybridization   A selective breeding method in which two genetically different individuals are crossed  
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Clone   An organism that is genetically identical to the organism from which it was produced  
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Gene Therapy   The insertion of working copies o fa gene into the cells of a person with a genetic disorder in an attempt to correct the disorder.  
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Selective Breeding   The process of selecting a few organisms with desired traits to serve as parents of the next generation.  
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Carrier   A person who has one recessive allele for a trait,but does not have the trait  
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Genetic Engineering   The transfer of a gene from the DNA of one organism into another organism,in order to produce an organism with desired traits.  
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Substitution   Is a type of mutation where a base pair is replaced by another base pair.  
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Deletion   A mutation in which a part of a chromosome or a sequence of DNA is missing.  
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Insertion   THe addition of one or more nucleotide base pairs into a DNA sequence.  
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Mutation   A permanent change in the DNA sequence that makes up a gene  
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Genome   All the DNA in one cell of an organism  
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Karyotype   A picture of all the chromosomes in a cell  
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