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25 Cards in this Set

  • Front
  • Back
heredity
passing of traits from parents to offspring
genetics
branch of biology that studies heredity
monohybrid crossing
a cross that considers one pair of contrasting traits
true breeding
all the offspring display only one form of a particular trait
P generation
first two individuals cossed in a breeding experiment
F1 generation
offspring of the P generation
F2 generation
offspring of the F1 generation
alleles
different versions of a gene
dominant
the expressed form of a trait
recessive
not expressed when the dominant form of the trait is present
homozygous
when the two alleles of a particular gene are the same
heterozygous
the alleles of a particular gene are different
genotype
set of alleles that an individual has
phenotype
physical apperance of a trait
law of segregation
the two alleles for a trait seperate when gametes are formed
law of independent assortment
the alleles of different genes seperate independently of one another during gamete foundation
Punnett Square
diagram the predicts the outcomes of a genetic cross
test cross
cross of a homozygous recessive individual with and individual with a dominant phenotype of unknown genotype
probability
the likelihood that a specfic event will occur
pedigree
a family history that shows how a trait is inherited
sex-linked trait
trait whose allele is located on the X chromosome
polygenic trait
when several genes influence a trait
incomplete dominance
when an individual displays a trait that is intermediate between the two parents
condominance
two dominant alleles are expressed at the same time
multiple alleles
genes with three or more alleles