Inheritance and Variation 0.0 / 5 ? BiologyDNA and inheritanceIGCSECIE Created by: OliviaCreated on: 04-03-15 18:22 Transmission of genetic information from generation to generation Inheritance 1 of 21 A thread of DNA made from a string of genes Chromosome 2 of 21 A length of DNA which codes for a specific protein Gene 3 of 21 An alternative form of a gene Allele 4 of 21 Contains a single set of chromosomes (e.g. sperm and egg) Haploid nucleus 5 of 21 Contains two sets of chromosomes (e.g. body cells) Diploid nucleus 6 of 21 Carries genetic information Nucleus 7 of 21 Chemical which is in the form of long strands of genetic information DNA 8 of 21 Physical characteristics of an individual based on its genotype and environment Phenotype 9 of 21 The genetic consitution of an individual Genotype 10 of 21 A pair of genes containing one dominant and one recessive allele Heterozygous 11 of 21 A pair of genes containing two identical alleles Homozygous 12 of 21 An allele which, when present, is always expressed Dominant 13 of 21 An allele which is only expressed when paired with an identical allele Recessive 14 of 21 Strand of a duplicated chromosome Chromatid 15 of 21 Joins the chromatids together Centromere 16 of 21 When both alleles are always expressed Co-dominance 17 of 21 Males contain this chromosome pair... XY 18 of 21 Division of a cell producing two gentically identical cells Mitosis 19 of 21 Change in a gene or chromosome Mutation 20 of 21 When there is an extra number 21 chromosome a person will develop ________ Down's Syndrome 21 of 21
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