Describe a chromosome mutation as a change in the chromosome number or structure, using Down’s syndrome as an example (47 chromosomes instead of 46)
Questions and Answers
Describe a gene mutation as a random change in the base sequence of DNA, using sickle cell anaemia as an example
Describe a gene mutation as a random change in the base sequence of DNA, using sickle cell anaemia as an example
Describe the determination of sex in humans (XX and XY chromosomes)
Describe the determination of sex in humans (XX and XY chromosomes)
State that two identical homozygous individuals that breed together will be pure-breeding
State that two identical homozygous individuals that breed together will be pure-breeding
Explain why observed ratios often differ from expected ratios, especially when there are small numbers of offspring
Explain why observed ratios often differ from expected ratios, especially when there are small numbers of offspring
Use genetic diagrams, including Punnett squares, to predict the results of monohybrid crosses and calculate phenotypic ratios, limited to 1:1 and 3:1 ratios
Use genetic diagrams, including Punnett squares, to predict the results of monohybrid crosses and calculate phenotypic ratios, limited to 1:1 and 3:1 ratios
Understand and use the terms: dominant, recessive, phenotype, genotype, homozygous and heterozygous
Understand and use the terms: dominant, recessive, phenotype, genotype, homozygous and heterozygous
Define an allele as an alternative form of a gene
Define an allele as an alternative form of a gene
Describe inheritance as the transmission of genetic information from generation to generation
Describe inheritance as the transmission of genetic information from generation to generation
Describe that different sequences of amino acids give different shapes to protein molecules
Describe that different sequences of amino acids give different shapes to protein molecules