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32 Cards in this Set
- Front
- Back
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Heredity |
The passing of traits from parents to offspring |
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Dominant |
gene that dominates or masks another gene for the same trait |
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Recessive |
gene that is not expressed when paired with dominant gene |
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homozygous |
organism that has two identical genes for a particular trait |
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heterozygous |
organism that has two different genes for a particular trait |
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How many chromosomes are present in the human cell? |
23 pair |
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phenotype |
the physical appearance or what the gene makes an organism look like |
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genotype |
the genetic make up of an organism, expressed using letters |
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Widows Peak |
Hair pattern |
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Dimples |
Found on cheeks |
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Earlobes |
attached or free |
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Toe length |
varies |
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Tounge roller |
can or cannot |
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Curved thumb |
Hitchhikers versus non |
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Cleft chin |
present or not |
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The father of Genetics |
Mendel |
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The scientific study of heredity |
Genetics |
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During meiosis the number of chromosomes in a cell is |
reduced |
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Double Helix |
DNA molecules in a spiral shape |
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A change in DNA sequence |
mutation |
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Dupliucation |
DNA base repeated |
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Deletion |
DNA removed |
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Subsititution |
DNA base is replaced |
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Insertion |
DNA base is added |
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Evolution |
the gradual change through time involving the earth and living things |
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A scientist who studies fossils |
paleontologist |
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Fossil |
the remains of organisms that once lived |
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relative dating |
determines the approximate age of the fossil |
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radioactive dating |
Determines the fossils age within 2-3% accuracy |
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Organisms that are best suited to their environment reproduce more successfully than others over generations with more favorable traits |
Darwin's Theory |
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How are male and female chromosomes different? |
XX, XY |
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Pedigree |
A family tree that traces a specific trait through genetics |
