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science chapter 3

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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Term
Definition
heredity   is the passing of physical characteristics from parents to offspring hint hint heredity  
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trait   a specific characteristic hint hint trait  
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genetics   mendel experiments with thousands of peas hint hint genetics  
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fertilization   sperm cells and a egg joins together hint hint fertilization  
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purebred   organisms offspring of many generations that have the same form of a trait hint hint purebred  
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gene   factors control trait hint hint gene  
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allele   are the different forms of a gene hint hint allele  
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dominate allele   is one whose trait always shows up in the organism when the allele is present hint hint dominate allele  
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recessive allele   on the other hand is hidden whenever the dominant allele is present hint hint recessive allele  
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hybrid   organisms has two different allele for a trait hint hint hybrid  
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probability   a number that describes how likely it is that an event will occur hint hint probability  
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punnett square   is a chart that shows all the possible ways alleles can combine in a genetic cross hint hint punnett square  
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phenotype   is a physical appearance hint hint phenotype  
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genotype   organisms alleles hint hint genotype  
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homozygous   an organism that has two identical alleles for a hint hint homozygous  
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heterzygous   an organism that has two different alleles for a trait hint hint heterzygous  
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incomplete dominance   occurs when one allele is only partially dominant hint hint incomplete dominance  
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codominance   occurs when both alleles for a gene are expressed equally hint hint codominance  
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multiple alleles   which means that three or more possible alleles determine the trait hint hint multiple alleles  
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polygenic inheritance   occurs when more then one gene affects a trait hint hint polygenic inheritance  
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meiosis   is the process by which the number of chromosomes is reduced by half as sex cells form hint hint meiosis  
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