Objectives for Genetics

______G1. Define gene, allele and genome. _______

______G2. Define genotype, phenotype, dominant allele, recessive allele, codominant alleles, locus, homozygous, heterozygous, carrier and test cross. _______

______G3. Determine the genotypes and phenotypes of the offspring of a monohybrid cross using a Punnett grid (square). _______

______ G4. State that some genes have more than two alleles (multiple alleles). _______

______ G5. Describe ABO blood groups as an example of codominance and multiple alleles. _______

______ G6. Explain how the sex is determined in humans. _______

______ G7. State that some genes are present on the X chromosome and absent from the shorter Y chromosome in humans.

______ G8. Define sex linkage. ______

______G9. Explain how scientists can use crossover frequency to determine the position of alleles on a chromosome _______.

______ G10. Describe the inheritance of colour blindness and hemophilia as examples of sex linkage. _______

_____ G11. Explain that female carriers are heterozygous for X-linked recessive alleles. _____

_____ G12. Deduce the genotypes and phenotypes of individuals in pedigree charts. _______

______G13. Explain the consequence of a base substitution mutation in relation to the processes of transcription and translation, using the example of sickle-cell anemia. ________