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Genetics Test Review

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

Heredity   Is the passing of physical characteristics from parents to offspring  
Trait   A characteristics that an organism can pass on to its offspring through its genes, such as stem height or seed color  
Genetics   The scientific study of heredity  
Fertilization   The process in which an egg cell and a sperm cell join to form a new organism  
Purebred   An offspring of many generations that have the same trait  
Gene   A segment of DNA on a chromosome that control a trait  
Alleles   Are the different forms of a gene  
Dominant Allele   Is one whose trait always shows up in the organisms when the allele is present.  
Recessive Allele   Is hidden whenever the dominant allele is present  
Punnet Square   Is a chart that shows all the possible outcomes of a genetic cross, and to determine the possibility of a particular outcome  
Phenotype   An organism's physical appearance, or visible traits  
Genotype   An organism's genetic makeup, or allele combination  
Homozygous   An organism that has two identical alleles for a trait  
Heterozygous   An organism that has to different alleles  
Codominance   A condition in which neither of two alleles of a gene is dominant or recessive. Both alleles are expressed in the offspring.  
Meiosis   Is the process by which chromosome pairs separate and are distributed to two different cells. The resulting sex cells have half the number of chromosomes as other cells in the organism.  
Mutation   A change in a gene or chromosome  
SS or Ss or ss   Genotype  
Smooth pods or Pinched pods   Phenotype  
Some alleles are _____________, while other alleles are _________________.   dominant, recessive  
An organism's traits are controlled by the ______________ inherited from its parents.   Alleles  
Probability   Is the likelihood that a particular event will occur  
Hybrid   An organism that has two different alleles for a trait (Heterozygous)  
True or False? The allele that each parent will pass on to its offspring is based on probability.   True  
True or False? In codominance, the alleles are both dominant and recessive .   False (it is neither)  
Chromosome Theory of Inheritance   States that genes are carried from parents to their offspring on chromosomes.  
Chromosomes   contains DNA that carries genetic information.  


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Created by: Achenry45