Ashley+and+Sami

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Definitions
 * Genetics-** the study of heredity
 * True-breeding-** only showing one form of a trait after several generations of self-pollination
 * Monohybrid cross-** a cross that involves only one trait
 * Dihybrid cross-** a cross that involves two traits
 * P1 (Parental Generation)-** first two individuals crossed in breeding experiment
 * F1 (First Filial Generation)-** offspring from P1 generation
 * F2 (Second Filial Generation)-** offspring of the F1 generation self-pollinating
 * Dominant traits-** represented by a capital letter; trait that shows through over recessive
 * Recessive traits-** represented by a lower case letter; trait that my not show through because of dominant traits
 * Polygenic-** several genes influenced


 * Monohybrid cross**- a cross involving only one trait

A heterozygous male heffalump breeds with a heterozygous female heffalump.

T=Tall t=Short

TT=Tall Tt=Tall Tt=Tall tt=Short


 * Dihybrid Cross-** a cross involving two traits

A homozygous dominant male breeds with a homozygous dominant female. Both traits are homozygous. A=Apple shaped B=Blue