Genotype phenotype purebred breeding and crossbreeding
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Genotype, Phenotype, Purebred Breeding, and Crossbreeding. Objectives. Define genotype and phenotype and know the differences with 100% accuracy. Define purebred breeding and crossbreeding and know the differences with 100% accuracy.

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Genotype, Phenotype, Purebred Breeding, and Crossbreeding

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Genotype phenotype purebred breeding and crossbreeding

Genotype, Phenotype, Purebred Breeding, and Crossbreeding


Objectives

Objectives

  • Define genotype and phenotype and know the differences with 100% accuracy.

  • Define purebred breeding and crossbreeding and know the differences with 100% accuracy.

  • Identify examples of genotype and phenotype in animals with 80% accuracy.

  • Identify purebred and crossbred animals with 80% accuracy.


Key terms

Key Terms

  • Genotype: Genetic makeup of an animal.

  • Phenotype: The outward expression of a gene.

  • Purebred Breeding: The breeding of animals within the same breed.

  • Crossbreeding: The breeding of two different pure breeds.

  • Codominance: a cross between organisms with two different phenotypes produces offspring with a third phenotype in which both of the parental traits appear together. 

  • Incomplete dominance: a cross between organisms with two different phenotypes produces offspring with a third phenotype that is a blending of the parental traits. 


Genotype phenotype purebred breeding and crossbreeding

Why?

  • Why should we know the difference between genotype and phenotype?

  • Why should we know the difference between purebred and crossbred animals?

  • Why should we know how to identify animals that are purebred or crossbred?


Genotype phenotype purebred breeding and crossbreeding

What?

  • What is the difference between genotype and phenotype?

  • What is the difference between purebred and crossbred?

  • What are examples of animals that are purebred and crossbred?


What is the difference between genotype and phenotype

What is the difference between genotype and phenotype?

  • Genotype: Genetic makeup of an animal.

    • Genotype is in the gene. It is something that we cannot directly see.

  • Phenotype: The outward expression of a gene.

    • Phenotype is the characteristic of the animal that we can see. Ex, Holsteins are black and white.


What is the difference between purebred and crossbred

What is the difference between purebred and crossbred?

  • Purebred Breeding: The breeding of animals within the same breed.

    • Ex, Angus breeds with Angus not with Red Angus

  • Crossbreeding: The breeding of two different pure breeds.

    • Ex, Angus can breed with Red Angus


What are examples of animals that are purebred and crossbred

What are examples of animals that are purebred and crossbred?

  • What are examples of animals that are purebred and crossbred?

    • Animals are considered pure bred when they meet all the characteristics of the breed.

    • Owners of the animal will be able to track the lineage of the animal to ensure heritage.

    • Many ranches will have a purebred stud.

      • This can bring in a lot of money due to other owners wanting their females to breed with a purebred.


Codominance

Codominance

A cross between organisms with two different phenotypes produces offspring with a third phenotype in which both of the parental traits appear together. 

redxwhite--->RED & WHITE SPOTTED

R = allele for red flowers

W = allele for white flowers

red x white ---> red & white spotted

RR x WW ---> 100% RW


Incomplete dominance

Incomplete dominance

A cross between organisms with two different phenotypes produces offspring with a third phenotype that is a blending of the parental traits. 

RED Flower x WHITE Flower ---> PINKFlower

R = allele for red flowers

W = allele for white flowers

red x white ---> pink

RR x WW ---> 100% RW


Project

Project

  • Create a new breed of animal.

  • Crossbreed two breeds of animals to get desired traits.

  • Needs to show multiple characteristics and have a punnett square for each one.

    • EX). Body type, hair/fur color, body size, ect.

    • Must use at least one codominant or incomplete dominant trait.

  • Draw an example of your creation.

  • Name your creation.

  • Present to the class what you made and how.


Review

Review

  • What is the difference between genotype and phenotype?

  • What is the difference between purebred and crossbred?

  • What are examples of animals that are purebred and crossbred?


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