Inheritance

In this chapter, you will learn to:

• Describe the process of meiosis and explain its importance in maintaining chromosome number during sexual reproduction and producing genetically diverse offspring.

• Describe and explain how different gene alleles influence phenotype.

• Construct and interpret genetic diagrams for monohybrid crosses, including dominant, recessive, and codominant alleles, as well as sex linkage.

• Construct and interpret genetic diagrams for dihybrid crosses, including dominant, recessive, and codominant alleles, autosomal linkage, and epistasis.

• Apply the chi-squared test to assess the significance of differences between observed and expected results in genetic crosses.

• Explain the relationship between genes, proteins, and phenotype, using TYR, HBB, F8, and HTT genes as examples.

• Explain how Le and le alleles control gibberellin production and stem elongation in plants.

• Use the lac operon to explain the control of gene expression in prokaryotes.

• Describe how transcription factors control gene expression in eukaryotes, including the roles of gibberellin and DELLA protein repressors in plants.