17.4 dihybrid inheritance Flashcards
1
Q
what is dihybrid inheritance?
A
2 characters, determined by 2 different genes located on different chromosomes, are inherited
2
Q
what is the law of independent assortment?
A
each member of a pair of alleles may combine randomly with either of another pair
3
Q
draw a dihybrid cross between 2 pure breeding fruit flies with red eyes (R) and tiny wings (t) and pink eyes (r) and normal wings (T)
A
100% RrTt with red eyes and normal wings
4
Q
what is the ratio of a dihybrid cross?
A
9:3:3:1
