Breeding cats without tails 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about genetics. In cats the form of the gene causing them to be tailless (M) is dominant to the form of the gene which causes normal tail (m). Question 2Change answer a) What would be the genotype of a true-breeding tailless cat? Question 2Change answer b) What would be the genotype and phenotype of a heterozygous cat? i) genotype ii) phenotype Question 2Change answer c) A tailless cat was mated with a normal tailed cat and all the kittens produced were tailless. Explain this result. c) A tailless cat was mated with a normal tailed cat and all the kittens produced were tailless. Explain this result. Task administration: This task can be completed with pencil and paper or online (with SOME auto marking). Level: 5 Curriculum info: Science, Knowledge, Living World Keywords: evolution, genetics, monohybrid cross, punnet square Description of task: Students answer questions about genotype and phenotype in cats, and explain a breeding result for the genetic characteristic 'taillessness'. Curriculum Links: Science capabilities The capabilities focus is brought about by the conversations you have and the questions you ask. Capability: Interpret representations This resource provides opportunities to discuss the use of symbols and punnet squares in interpreting genetic relationships. Science capability: Interpret representations (Tāhūrangi) Science capabilities: Interpret representations Answers/responses: Y10 (08/1997) a) MM moderate b) i) ii) Mm tailless difficult very difficult c) The tailless cat must have been homozygous/ MM/true breeding. very difficult Long-haired and short-haired rabbits Ear lobes Mendel's peas Long-haired and short-haired cats
