Inheritance 0.0 / 5 ? ScienceInheritance IGCSECIE Created by: AIV17Created on: 09-12-20 13:34 What is a chromosome? A long, thin structure of DNA, carrying genetic information by genes 1 of 25 What is a gene? A length of DNA that codes for a protein what to do 2 of 25 Do all species have the same genes? No, only twins 3 of 25 What is a haploid nucleus? A nucleus with a single set of unpaired chromosomes 4 of 25 What is a diploid nucleus? A nucleus with 2 sets of chromosomes 5 of 25 How are chromosomes arranged in a diploid cell? They are arranged in pairs 6 of 25 How are the 2 chromosomes of a pair called? They are called homologous chromosomes 7 of 25 Which type of cell division produces genetically identical cells? Mitosis 8 of 25 In which situations does mitosis take place? Growth, repairing of damaged cells and asexual reproduction 9 of 25 What happens before mitosis? Chromosomes duplicate themselves 10 of 25 What is meiosis? Reduction division in which the chromosome number is halved from diploid to haploid resulting in genetically different cells 11 of 25 What is made by meiosis? Gametes 12 of 25 What is an allele? A version of a gene 13 of 25 How is the sex of a person known? By the last pair of chromosomes, called sex chromosomes 14 of 25 Which is the genotype of a man? XY 15 of 25 Which is the genotype of a woman? ** 16 of 25 What is inheritance? The transmission of genetic information from generation to generation 17 of 25 What is a genotype? The genetic makeup of an organism in terms of the alleles present 18 of 25 What is a phenotype? The observable features of an organism 19 of 25 What is homozygous? Having two identical alleles of a particular gene 20 of 25 What happens if two identical homozygous individuals breed together? The offspring will be pure-breeding 21 of 25 What is heterozygous? Having two different alleles of a particular gene 22 of 25 Can a heterozygous individual be pure-breeding? No, only homozygous individuals 23 of 25 What is a dominant allele? An allele that affects the phenotype if present 24 of 25 What is a recessive allele? An allele that affects the phenotype when there is no dominant allele 25 of 25
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