Daily Review Type of Reproduction • There are two types of reproduction: 1. Asexual reproduction 2. Sexual reproduction • Asexual reproduction involves a single organism making an exact genetic copy of itself. • Sexual reproduction involves combining genetic material from two organisms to produce a new, genetically unique organism. Think, Pair, Share: Which type of reproduction produces more variety in the offspring? 1 Daily Review Forms of Asexual Reproduction 1. Binary fission is when single-celled organisms, such as bacteria, split into two cells. 2. Fragmentation occurs when multicellular organisms split into two. 3. Parthenogenesis occurs when unfertilised eggs hatch into new organisms. 4. Vegetative reproduction is when part of a plant (leaves or stem) breaks off and creates a new plant. Think-pair-share: Which type of asexual reproduction is being shown in the photo? Explain your choice. 2 Daily Review Forms of Asexual Reproduction 1. Binary fission is when single-celled organisms, such as bacteria, split into two cells. 2. Fragmentation occurs when multicellular organisms split into two. 3. Parthenogenesis occurs when unfertilised eggs hatch into new organisms. 4. Vegetative reproduction is when part of a plant (leaves or stem) breaks off and creates a new plant. Think-pair-share: Which type of asexual reproduction is being shown in the photo? Explain your choice. 3 Daily Review Identifying Asexual and Sexual Reproduction 1. Is there one parent organism? = Asexual Are there two parent organisms? = Sexual 2. Describe the genetic variety in the offspring Pollen from one plant is transferred to the flowers of another plant. This is sexual reproduction because there are two parent organisms. The genetics of the offspring will be different to the parents. Daily Review Identifying Asexual and Sexual Reproduction 1. Is there one parent organism? = Asexual Are there two parent organisms? = Sexual 2. Describe the genetic variety in the offspring A male frog fertilises the eggs laid by a female frog. This is sexual reproduction because there are two parent organisms. The genetics of the offspring will be different to the parents. Daily Review Identifying Asexual and Sexual Reproduction 1. Is there one parent organism? = Asexual Are there two parent organisms? = Sexual 2. Describe the genetic variety in the offspring An amoeba uses binary fission to produce a new offspring. This is asexual reproduction because there is only one parent organism. The offspring is identical to the parents. Student worksheet 8.1 There are different ways of reproducing Pages 140–141 and 211 Reproduction 1 What is the difference between sexual and asexual reproduction? Asexual reproduction 2 What can be said of the genetic material between parent and offspring in asexual reproduction? 3 What is binary fission? 4 What is parthenogenesis? 5 Give an example of an organism that undergoes parthenogenesis. 6 What is fragmentation? Oxford University Press 2017 Oxford Science 8 Western Australian Curriculum Teacher obook assess ISBN 9780190307172 Permission has been granted for this page to be photocopied within the purchasing institution only. 7 Give an example of an organism that undergoes fragmentation. 8 What is fragmentation in plants called? 9 What parts of a plant does the term in question 8 refer to? Give three examples. Sexual reproduction 10 What is sexual reproduction? 11 What is offspring? 12 Why is variation within a population important? 13 What is the difference between identical and non-identical twins in terms of their DNA? Oxford University Press 2017 Oxford Science 8 Western Australian Curriculum Teacher obook assess ISBN 9780190307172 Permission has been granted for this page to be photocopied within the purchasing institution only. Hermaphrodites 14 What is a hermaphrodite? 15 Some organisms that are hermaphrodites can ‘turn off’ one sexual system. When and why would this be beneficial? Extend your understanding Hermaphroditism sometimes occurs in humans. 16 What tissues and organs must a human be born with in order to be a hermaphrodite? 17 What happens in the fertilisation process for hermaphroditism to occur in humans? 18 What is the more common and accepted term for a person who is a hermaphrodite? Oxford University Press 2017 Oxford Science 8 Western Australian Curriculum Teacher obook assess ISBN 9780190307172 Permission has been granted for this page to be photocopied within the purchasing institution only.
