HybridsHybrids

By: Ally Zeitz, Gary Courtney, Tim McGinley, Sam Barton

What are Hybrids?What are Hybrids?

Synonymous with heterozygous

Any offspring resulting from mating of two distinctly homozygous individuals or species

Can be plant or animal

Why Hybrids?Why Hybrids?

Genetic hybrids carry 2 alleles of same gene

Create more favorable and desirable characteristics in species

Can generally then reproduce with one another

Makes offspring with favorable characteristics.

Why Not Hybrids?Why Not Hybrids?

Animals reproduced are often sterileCan be a long and expensive process to

createCould they be harmful to humans when

eaten on a regular basis?

Intra-specificIntra-specific

Hybrids between different subspecies within one species of animal or plant

Inter-specificInter-specific

From completely different speciesFound within the same genusBred through matingOffspring receive characteristics from

both parentsHybrids are often sterile

Inter-genericInter-generic

Hybrids from different generaGenera: plural of genus, a category of

animals ranked below family and above species.

Formed from a group of species

Types of HybridsTypes of Hybrids

Single cross: created from two regular species who can produce own offspring

Double cross: cross between two F1 hybrids

Three way: cross between one F1 parent, and one from an inbred line

Triple cross: crossing 2 three way hybridsPopulation hybrids: one population is bred

with another

Rules of HybridsRules of Hybrids

There are limitations when making hybrids

The hybrid must be created when organism is still unicellular to be sure that each cell has specific genes

Hybrid “parents” must have similar genetic structures

Animal HybridsAnimal Hybrids

Must be manmade Do not yet have a high success rateOften do not make it past the first few

years of lifeCan still differ greatly from other hybrids

made exactly the same way

Plant HybridsPlant Hybrids

More successful than animalsCan often reproduce without side effectsPlants can become hybrids on their own

through pollinating and spreading seedsCreated by humans to perfect the

different plant species