Dihybrid inheritance Flashcards
1
Q
What is dihybrid inheritance?
A
inheritance of two characteristics that are controlled by separate genes e.g. T = Tall and t = dwarf
R = Red and r = yellow
2
Q
What would the parent 1 genotype and gametes be ?
A
TTRR - genotype
TR TR TR TR - gametes
3
Q
What would parent 2’s genotype and gametes be?
A
tt rr = genotype
tr tr tr tr - gametes
4
Q
What is the f1 generation?
A
100% herterozygotes
genotypes - TtRr
phenotypes - tall and red
5
Q
What is the f2 generation?
A
Parent 1 - TtRr - geno type
Parent 2 - Tt Rr - geno type
parent 1 and 2 = TR Tr tR tr - gametes
6
Q
What is the f2 phenotype?
A
tall and red (TTRR, TTRr, TtRR, TtRr)
Tall and yellow (TTrr, Ttrr)
Dwarf and Red (ttRR, ttRr)
Dwarf and Yellow (ttrr)
