Simple inheritance in animals and plants 0.0 / 5 ? BiologyDNA and inheritanceGCSEAQA Created by: HopeCreated on: 18-04-14 14:08 What is DNA? A molecule that carrys genetic code and that determines the chacteristics of a living thing 1 of 30 What is a gene? A section of DNA that has codes for a specific protein 2 of 30 Explain chromosomes It is made up of large molecules of DNA and has a double helix structure 3 of 30 What is mitosis used for? Repairing or replacing damaged cells 4 of 30 What cells divide using mitosis> Body cells 5 of 30 What are chromosomes usually found in, in body cells? Pairs 6 of 30 What is the first stage of mitosis? The cell duplicates, The DNA is copied and forms x-shaped chromosomes 7 of 30 What is the second stage of mitosis? The chromosomes line up at the centre of the cell and the cell fibres pull them apart 8 of 30 What is the third stage of mitosis> Membranes form around each set of the chromosomes 9 of 30 What is the last step of mitosis? The cytoplasm divides 10 of 30 What is a gamete> A sex cell 11 of 30 What type of cell division produces gametes? Meiosis 12 of 30 What cells divide to form gametes? Cells in the reproductive organs 13 of 30 What are the female and male reproductive organs? Ovaries and testes 14 of 30 How many sets of genetic information do gametes contain? One 15 of 30 What is different between animals and plants in terms of differentiation? Plant cells retain the ability to differentiate throughout life 16 of 30 What are stem cells? Cells that can be made to differentiate into many different types of cells 17 of 30 Where are stem cells found? Human embyros and adult bone marrow 18 of 30 What can stem cells be used for? Stem cell treatment in conditions such as parkinsons and paralysis 19 of 30 What is meiosis? When a cell divides to form gametes 20 of 30 What are alleles? Different forms of a gene. 21 of 30 What can alleles be? Dominant of ressesive 22 of 30 How many pairs of chromosomes are there in human body cells? 23 23 of 30 What are the two sex chromosomes in males? XY 24 of 30 What are the two sex chromosomes in females? ** 25 of 30 Complete this sentence: If the charcateristic is controlled by a dominant allele... It will develop if it is present on one or both chormosomes in the pair 26 of 30 Complete this sentence: If the characteristic is controlled by a recessive allele... It will only develop if it is present on both of the chromosomes in the pair 27 of 30 What is polydactyly? An inherited conditions in which a person has an extra finger or toes 28 of 30 What is polydactyly caused by? By a dominant allele of a gene. 29 of 30 How can someone inherit cystic fibrosis? Someone can only inherit it if both parents have it 30 of 30
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