State that mutation is the way in which new alleles are formed
State that mutation is the way in which new alleles are formed
1 Answer
Questions and Answers For
IGCSE Biology
322 Questions
1 AnswerDescribe mutation as genetic change
Describe mutation as genetic change
1 AnswerState that discontinuous variation is usually caused by genes only and continuous variation is caused by both genes and the environment
State that discontinuous variation is usually caused by genes only and continuous variation is caused by both genes and the environment
1 AnswerState that discontinuous variation results in a limited number of phenotypes with no intermediates; examples include ABO blood groups, seed shape in peas and seed colour in peas
State that discontinuous variation results in a limited number of phenotypes with no intermediates; examples include ABO blood groups, seed shape in peas and seed colour in peas
1 AnswerState that continuous variation results in a range of phenotypes between two extremes; examples include body length and body mass
State that continuous variation results in a range of phenotypes between two extremes; examples include body length and body mass
1 AnswerUse genetic diagrams to predict the results of monohybrid crosses involving codominance or sex linkage and calculate phenotypic ratios
Use genetic diagrams to predict the results of monohybrid crosses involving codominance or sex linkage and calculate phenotypic ratios
1 AnswerDescribe red-green colour blindness as an example of sex linkage
Describe red-green colour blindness as an example of sex linkage
1 AnswerDescribe a sex-linked characteristic as a feature in which the gene responsible is located on a sex chromosome and that this makes the characteristic more common in one sex than in the other
Describe a sex-linked characteristic as a feature in which the gene responsible is located on a sex chromosome and that this makes the characteristic more common in one sex than in the other
1 AnswerExplain the inheritance of ABO blood groups: phenotypes are A, B, AB and O blood groups and alleles are IA, IB and Io
Explain the inheritance of ABO blood groups: phenotypes are A, B, AB and O blood groups and alleles are IA, IB and Io
1 AnswerDescribe codominance as a situation in which both alleles in heterozygous organisms contribute to the phenotype
Describe codominance as a situation in which both alleles in heterozygous organisms contribute to the phenotype
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