Biology genetrics

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Author:
OCAB05
ID:
13233
Filename:
Biology genetrics
Updated:
2010-04-05 23:01:34
Tags:
genetics
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Description:
Vocab genetics
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  1. Genetics
    Study of heredity (passing of traits from parent to child) and variation in organisms.
  2. Trait
    • a characteristic of an organism
    • (ex: eye color, height)
  3. True breeding
    Parents producing offspring (children) with all of the same traits as the parents
  4. Hybrid
    When two different species mate. (example - When a horse and donkey mate, they make a mule, which is a hybrid
  5. Dominant trait
    The presence of ONE dominant gene is enough for the trait to show. It covers up the recessive trait.
  6. Recessive Trait
    TWO identical recessive genes are necessary for the recessive trait to show. It covers up the recessive trait.
  7. Gene
    helps determine a trait
  8. Allele
    Alternative forms of a single gene (ex: one gene controls eye color. One allele may be for blue eyes and another allele may be for green eyes.)
  9. Segregation
    The seperation of paired alleles during meiosis so that members of each pair of alleles appear in different gametes. (A gamete is an egg or sperm)
  10. Gamete
    An egg or sperm
  11. Probability
    The chance of something happening (ex: The chance that a couple's daughter will be color blind.)
  12. Punnet square
    Used to figure out the outcome of a cross between 2 individuals.
  13. Homozygous
    Having identical alleles for a gene (Ex: An individual has two alleles BOTH for blue eyes.)
  14. Heterozygous
    Having different alleles for a gene. (ex: An individual has two alleles, one for green eyes and one for blue eyes.)
  15. Phenotype
    Is what an organism looks like, what you can see.
  16. Genotype
    combination of alleles that determine the phenotype. You CANNOT see the gen

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