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Life Science key words and ideas

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Question
Answer
Punnet Square   Can be used to describe outocmes in offspring and the liklihood of each outcome.  
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Sex linked genes   mutation is on the X-Chromosome. (hemophilia or color blindness)  
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Chromosome   the rod-like compressed form of DNA in the nucleus  
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Photosynthesis   Cell uses energy in chloroplasts to make food (glucose)  
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Energy + H20 + C02   =02 + F6H1202  
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Genetic Engineering   Genes are transferred from one organism into another; makes plants resistant to disease.  
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Cytokinesis   Final stage of cell division where the cell membrane separates (pinching into two daughter cells.  
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Cell wall   In plants, this is formed as a cell divides, in between the two new cells.  
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Heredity   the passing of traits from parents to offspring.  
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Gene   The basic unit of heredity; a piece of DNA on the chromosome  
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Mendel   Father of genetics; he found that offspring of traits similar to their parents.  
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Dominant Gene   Is the stronger trait of the pair.  
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Recessive Gene   The weaker trait of a pair.  
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Homozygous   2 dominant genes (purebred)  
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Heterozygous   1 dominant and 1 recessive gene  
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genotype   The actual gene for an organis (TT, Tt)  
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Phenotype   The physical appearance of an organism (example blue eyes, freckles)  
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Mitosis   body cells have 46 chromosomes, human egg and sperm have 23 cells each.  
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allelle   The different forms of a gene, the alternating forms of a gene that governs a characteristic  
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pedigree   A diagram that shows the occurrence of a genetic train in several generations of a family.  
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Double helix   DNA is in the shape of a "twisted ladder"  
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Watson and Crick   Built models to show the DNA structure (like the double helix).  
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DNA reproduction   begins with one double helix, there are two when the process completes.  
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