A dihybrid cross can be used to follow the inheritance of one / two different traits in an organism. Making a dihybrid cross is a two-step process. The first step is to cross the diploid / haploid gametes obtained from two homozygous / heterozygous parents. One parent is dominant / recessive for both alleles of the traits of interest and the other parent is dominant / recessive. The resulting diploid / haploid offspring from this cross are called the F1 / F2 generation. This generation will eventually undergo meiosis / mitosis and sporulation, giving rise to diploid / haploid gametes which can be crossed as the second step of this process to produce the F1 / F2 generation.
Saccharomyces cerevisiae is a(n) archaean / bacterium / fungus / protist. Budding yeast have two mating types called a and alpha / alpha and beta cells. Diploid cells contain half / twice the number of chromosomes found in haploid cells. The number of different parental haploid yeast strains used in Experiment 5 to make the dihybrid cross was 2 / 4 / 8.
In lab for Experiment 5, you performed the first / second step of a dihybrid cross of S. cerevisiae because gametes produced from the F1 / F2 generation were provided to students. Of the dihybrid step you did not perform yourself in lab, the parental genotypes would have been _____ X _____ , resulting in gametes with genotypes of _____ and _____. Crossing these gametes would have resulted in 25% / 50% / 100% of the offspring having a genotype of _____ and a phenotype of _____.
In this experiment, MIN / YED plates were used to differentiate between red and white yeast colonies. If a colony grew on the MIN plate, this means the yeast can / cannot synthesize the amino acid _____. Red colonies result from a mutation affecting the adenine / aldose biosynthetic pathway.