BIO 123 PROBABILITY AND GENETICS LAB REPORT AND ANSWERS

PROBABILITY AND GENETICS LAB REPORT AND ANSWERS 1. Based on the parents' genotypes, what is the genotypic ratio expected from a monohybrid cross between the two parents for the trait? The genotype of both parents is Bb. Hence, after monohybrid cross, the genotype ratio can be determined as follows: The F1 generation will have genotype ratio BB:Bb:bb= 1:2:1. B b B BB Bb b Bb bb 2. Based on the genotypic ratio from question 1, what is the expected probability of each genotype? BB  25% Bb  50% bb  25% 3. Toss the coins together 50 times and keep a tally sheet while doing so. They can only turn up as BB, Bb, or bb. Remember: each coin represents each parent and each toss can only turn up one way, therefore, a parent can give only one gene of a pair. How many tally's for each genotype did you get? 1. BB 2. Bb 3. bb BB = 15 Bb = 24 bb = 11