Q 1. Define dominant, recessive, incomplete dominance and epistasis. 2. When a trait is sex-linked recessive, how does that affect the likelihood of the phenotype being expressed in a hemizygous individual versus an individual who is homozygous or heterozygous? 3. Assume a cross between a true-breeding crested male and a true-breeding non-crested female. What would be the genotypes of their offspring? If you were to inbreed two of those offspring, what would be the expected phenotypic ratios? 4. Assume a cross between a t-check female which carries an allele for t-check and check and a barless male which is homozygous recessive for barless. What would be the phenotypic and genotypic ratios of their offspring?

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