Monica+and+Chris

=Heredity=

Definitions:

 * Genetics-**The branch of Biology that focuses on heredity.
 * Heredity-**The passing on of traits from parents to offspring.
 * Gregor Mendel-**The father of genetics.
 * Monohybrid Cross-**A cross that involves only one trait.
 * Parental Generation (P1)-**The first 2 individuals that are crossed in a breeding experiment.
 * First Filial Generation (F1)-**The offspring from the P1 cross.
 * Second Filial Generation (F2)-**The offspring from the F1 generation self-pollinating.
 * Cross-**The mating of 2 individuals.
 * True Breeding****-**A plant is true breeding if it only shows 1 form of a trait after several generations of self-pollination.
 * Genotype-**The set of alleles an individual has.
 * Dihybrid cross****-** A cross that involves two traits.



Dihybrid cross
A cross between two plants that differ in only two traits is a dihybrid cross.

P1 ROUND/YELLOW X WRINKLED/GREEN RRYY rryy

F1 100% ROUND/YELLOW RrYy

F2 3:1 RY || RR/YY Round/yellow || RR/Yy Round/yellow || Rr/YY Round/yellow || Rr/Yy Round/yellow || Ry || RR/Yy Round/yellow || RR/yy Round/green || Rr/Yy Round/yellow || Rr/yy Round/green || rY || Rr/YY Round/yellow || Rr/Yy Round/yellow || rr/YY Wrinkled/yellow || rr/Yy Wrinkled/yellow || ry || Rr/Yy Round/yellow || Rr/yy Round/green || Rr/Yy Round/yellow || rr/yy Wrinkled/green ||
 * X || RY || Ry || rY || ry ||

=Monohybrid cross P1 Round X Wrinkled F1 Round X Wrinkled F2 9:3:3:1=