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Download Chapter 12 I am - Mrs Smith`s Biology
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Fail to reach their full potential height Additive Effect I am the sex that contains two fully homologous sex chromosomes Environmental Factors I am examples of human characteristics that show polygenic inheritance Superscripts I am what happens to an individual if they don’t consume an adequate diet during childhood and adolescence regardless of how many dominant alleles for height they possess Factor VIII I am the sex-linked condition caused by a recessive allele that does not allow a person to have normal colour vision I am the type of allele that is responsible for the sex-linked conditions haemophilia, redgreen colour blindness and duchenne muscular dystrophy Three or More Genes I am the number of genes that are thought to control polygenic inherited characteristics like skin colour, hand span, foot size, weight and height Discontinuous Variation I am the other factor that can influence the overall phenotype of an individual usually showing continuous variation I am the type of variation that varies amongst the population from one extreme to the other and does not fall into distinct groups Female Weight and Height Skin colour, hand span, foot size, weight I am the type of inheritance where a I am the smaller of the two types of sex characteristic that is controlled by more than chromosome one gene Duchenne Muscular Dystrophy Continuous Variation I am the type of inheritance that can be used to divide up the members of a species into two or more distinct groups His Y chromosome does not possess alleles of any sex-linked genes and cannot offer dominance to them I am the name given to the letters used to represent the alleles of sex-linked genes Carrier I am the sex of child that always end up with red-green colour blindness if the mother has the condition I am two examples of variation that is continuous and does not fall into distinct groups Male I am the essential blood –clotting factor that haemophiliacs fail to make. Instead they make an inferior version of it Recessive Allele I am the condition that causes severe disability from a young age, muscle wasting, early death and is almost entirely restricted to males Polygenic Inheritance Sex-Linked Genes I am the name given to the effect of each gene involved in polygenic inheritance adding a contribution to the overall phenotype Y- Chromosome I am the reason why the genes on the X chromosome are always expressed in the phenotype of the human male produced whether the gene is dominant or recessive Red-Green Colour Blindness I am the name given to genes found on the X chromosome I am the name given to a female who is heterozygous for red-green colour blindness who is unaffected themselves but may pass on the colourblindess allele to their offspring