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Genetics Quiz
Genetics and Punnett Squares
14
Science
7th Grade
02/15/2008

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Cards

Term
Gene
Definition
  • the instructions for inherited traits
  • for each gene there are two alleles
  • some genes inflluence more than one trait
Term
allele
Definition
  • one of the alternative forms of a gene that governs a characteristics, such ass hair color
  • each parents gives one set of alleles to the organism
  • both alleles make up the organism's genotype

 

Term
heredity
Definition
  • the passing of genetics traits from parent to offspring
Term
dominant
Definition
  • the trait observed in the first generation when parents the have different traits are bred
  • visible
Term
recessive
Definition
  • a trait that reappears in the second generation
Term
incomplete dominance
Definition
Term
genotype
Definition
  • the entire gentic makeup of an organismm
  • the combinationn of genes for one or more specific traits
  • the set of alleles an organism has in herited from it's parents
  • contains 2 alleles 1 from each parent
Term
phenotype
Definition
  • an organism's appearence or other detectable characteristic
  • the way the genotype affects the organism physically
Term
purebred
Definition
  • genotypes are the same
  • Mendell used them in his first experiment
Term
true breeding
Definition
Term
homozygous
Definition
  • the genotypes are the same TT tt
  • a organism with either 2 dominant or 2 recessive genes
Term
heterozygous
Definition
  • the genotypes are different Tt
  • one dominant and one recessive gene
Term
hybrid
Definition
  • when the 2 genes are different Tt
Term
traits
Definition
  • more than one gene can in fluence them
  • are different forms of characteristics
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