This is a zipped folder containing a pdf and an editable version of each of the. Eighth grade lesson natural vs artificial selection. The process of taking out threads from the cocoon for use as silk is called reeling the silk. Can you think of some possible dangers of selective breeding. Ask students if they know any realworld examples of selective breeding. These are called desirable characteristics, such as breeding a strong, large cow with a cow which produces a significant amount of milk. Gmos the solution to world hunger or a disaster in the. Humans have selectively bred plants and animals for thousands of years including.
Selective breeding make the following foldable to help you illustrate the pros and cons of selective breeding. Turkey selective breeding reading passage and a worksheet with an answer key is included. Fold a vertical sheet of paper in half from top to bottom. Domestication of plants is an artificial selection process conducted by humans to produce plants that have more desirable traits than wild plants undesirable. Essential educations 2014 ged test curriculum blueprint pdf. Paintingthere are real examples of glowing animals and plants, select. In contrast, a chicken born out of selective breeding can lay as many as 300. Students are encouraged to formulate their own opinions, especially in relation to the different ways we use. The hope of making this selection is that the offspring will inherit the desirable traits, allowing future generations to benefit from the chosen changes. Selective breeding allows the farmer to have the best quality animalsplants on his farm, in order to gain a profit obviously. Selective breeding an overview sciencedirect topics.
Students are encouraged to formulate their own opinions, especially in relation to the different ways we use animals in producing food. Native americans selectively bred teosinte, a wild grass native to central mexico, to produce corn, a far more productive and nutritious plant. Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations. Selective breeding usually involves breeding two members of a species with the dominant allele if the desired characteristic.
Selective breeding involves breeding animals or plants for a specific, typically desirable trait. Explain why humans selectively breed plants and animals. Introduce sheep as an important managed livestock species in the u. Find selective breeding plants lesson plans and teaching resources.
Emphasis is placed on the following vocabulary terms. For corn that is sweet, potatoes that are nontoxic all crop plants, in fact you have genetic manipulation to thank. Recent refinements allow plant breeders to restrict the transferred genetic material. This diversity is the result of both natural selection and selective breeding. Gm achieves this by adding a new gene or genes to the genome of a crop plant. Methods and mechanisms for genetic manipulation of plants. For thousands of years, weve produced new varieties of. Selective breeding and food chains worksheets the selective breeding of farm animals worksheet explains the basic process using chickens as an example. Human would have selected the traits that were most beneficial to us as humans.
Selective breeding works because of the natural genetic variation in a population. Browse selective breeding worksheet resources on teachers pay. Today artificial selection is more often called selective breeding. Explain an example of selective breeding, eg wheat plants have been selectively bred for. Ks3 science revision worksheets special edition isbn 0 9537409 3 5 introduction. For a given gene, mutations are rare events, but considering the large numbers of plants in a. If the statement is false, change the underlined word or words to make the statement true.
Place one strawberry into the mortar and grind it with the pestle. Direct students to take out the ownership card pdf, which they will be filling in, and the dog breeds pdf handout, which contains the breeds they. Future generations of selectively bred plants and animals will. On a sheet of unlined paper, create a political cartoon representing one of the ideas in the three. Selective breeding pros selective breeding cons illustrate and label as you read chapter, list the pros and cons of selective breeding under the appropriate tab. By purchasing this file, you agree not to make it publicly available on websites, etc. Students complete a preassessment to show what they already know about the topic of selective breeding in dogs. They can also develop high quality crops that can defend against pests. Selective breeding natural selection and selective. A table for the pupils to enter 1 the fruit or vegetable, and then 2 which characteristic has been selectively bred. Science class 7 grade 7 chapter 0110 science class 7 grade 7 chapter 0110 chapter 3 fibre to fabric 1. Conventional breeding achieves it by crossing together plants with relevant characteristics, and selecting the offspring with the desired combination of characteristics, as a result of particular combinations of genes inherited from the two parents. List 7 potential benefits to humans of selectively breeding crops. Students gain the understanding that selective breeding is used to create animals and plants with the characteristics that humans desire.
Genetic engineering worksheet teachers pay teachers. C these examples highlight both the benefits and drawbacks. Typically, strains that are selectively bred are domesticated, and the breeding is normally done by a professional breeder. Selective breeding north allegheny school district. These july elberta peaches, prunus persica, are among his most successful varieties. Selective breeding new aqa biology gcse teaching resources. Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. This process of selecting parents for obtaining special characters in their offspring, such as soft under hair in sheep, is termed selective breeding. And selective breeding is really just a primitive form of genetic manipulation. Traditional and modern plant breeding methods with. For example, plant breeders can identify and characterize genetic sources of resistance to stripe rust, a fungal disease that infects wheat plants. The worksheet also reinforces other biological concepts including genetic and environmental causes of variation, mutations and natural selection.
Genetic modification produces trait combinations that would never happen in nature. Genetic modification is fast, but selective breeding is slow. A dog with long legs and is fast, would be breed with a dog that is strong and muscular. Selective breeding is the process of breeding plants and animals for particular genetic traits. Learn selective breeding with free interactive flashcards. Selective breeding scientists pick out the best traits in organisms to create the species they prefer. The aim of this resource is to provide a complete revision guide for the key. As you can see, selective breeding comes with both benefits and drawbacks. Describe the process of selective breeding and give examples. Plant breeders usually want to combine the useful features of two plants. We breed together a male and female that show some of those characteristics. Think of all the joy that dogs have offered humans in the form of companionship over the last 100 years. Divide students into lab pairs and allow each group to complete the lab procedures outlined on page one. Artificial selection works the same way as natural selection, except that with natural selection it is nature, not human interference, that makes these decisions.
Selective breeding definition in the cambridge english. Conventional breeding achieves it by crossing together plants with relevant characteristics, and selecting. Your task is to use the next 25 minutes to create a list of organisms whose genetics have been influenced using. Dog breeders commonly use this process in order to get desired traits in puppies. Central american farmers were selectively breeding a variety of crop plants, especially corn. What is the difference between selective breeding and. If needed, explain the difference between natural selection and selective breeding using the video, artificial vs.
The worksheet discusses the basic principles of selective breeding while raising ethical issues relating to the use of science and technology. This way at least some of the puppies will be fast and strong. Selective breeding also called artificial selection is the process by which humans breed other animals and plants for particular traits. Domestic animals are commonly bred for various traits. For thousands of years, weve produced new varieties of cultivated plants and nearly all domestic animals by selectively breeding for particular traits. D different examples of selective breeding and the impact of selective breeding on some animals 3. Give each student one copy of the strawberry breeding and genetics student handout. Details selective breeding involves mating organisms with desirabletraits to get offspring with the desirable traits of both parents humans choose selective breeding is used mostly for dogs, cats, other pets, cattle, and crops. Lesson plan and resources for selective breeding biology lesson. Explain that each group will be trying to artificially select a new dog with certain traits by crossing two existing breeds. How does gm differ from conventional plant breeding. What traits might humans have selected in the common ancestor of dogs and wolves that would account for the differences between dogs and wolves.
Lesson for inheritance, variation and evolution chapter in new aqa biology gcse. C the advantages and disadvantages of selective breeding 6. National cooperative dairy herd improvement program, fact sheet k7. Selective breeding worksheet compassion in world farming. Selective breeding worksheet teachers pay teachers. Explain that over 200 different sheep breeds exist.
In the same way that hens are selectively bred for eggs, cows are often selectively bred for meat or milk. History of selective corn breeding polytech high school. Selective breeding is to thank for mans best friends. People selectively breed domesticated plants and animals to produce offspring with preferred characteristics. Selective breeding is the traditional method for improving crops and livestock, such as increasing disease resistance or milk yield. Modern domesticated dogs arose from wolves through selective breeding by humans. Worksheet activity looking a selective breeding in fruits and vegetables for ks3 biology students. For thousands of years, weve produced new varieties of cultivated plants and nearly all domestic animalsincluding. The selective breeding or genetic modification of crop plants to secrete biological nitrification inhibitors in the rhizosphere, where aob can proliferate in response to ammonia fertilizers glaser et al. Explain an example of selective breeding, eg wheat plants have been selectively bred for yield, protein content, resistance to disease, flavour, to be good for making biscuits etc. A breeder will track the characteristics of the litter and.
Once students are familiar with what artificial selectionselective breeding means, students are given 25 minutes to use research to create list of organisms that are associated withcreated by artificial selectionselective breeding. The goal of both gm and conventional plant breeding is to produce crops with improved characteristics by changing their genetic makeup. Give an example of selective breeding and describe what trait might be selected. Choose from 500 different sets of selective breeding flashcards on quizlet. Selective breeding selective breeding can also bring about bad or undesirable traits some breeds of dogs are selectively bred for their aggressiveness, however, this sometimes produces dogs are too aggressive an cannot be controlled. Explain the benefits and risks of selective breeding in plants and animals. The texts compares turkey selective breeding and genetically modified corn. This worksheet has 1 multiple choice, 7 fill in the blank, 1 graphic organizer, and 4. Selective breeding is a process of a selecting the offspring with desired properties.