BIO 105 Lecture Notes - Lecture 16: Dihybrid Cross, Punnett Square, Gamete
Document Summary
Genes affecting different traits behave independently of each other during gamete formation. He then crossed f1 seeds and got: Another way to look at f1 x f1 cross: This is how he got his principle that each trait is inherited independently. Each f1 parent (rryy) produces 4 gametes. Remember that gametes are haploid and contains one copy of each and every gene. Half the gametes with have r and half will have r. Half will have y and half will have y. Or you can look at each trait separately. Rr x rr and yy x yy. Probability of round (3/4) x probability of green (1/4) The probability of 2 independent events is the product of their two separate probabilities. (3/4) x (1/4) (3/16) 2 types half are cd half are cd. Probability of wavy x probability of dark= product. Heritability is different today than it is in july. May sometimes depend on the phenotype examined.
