Principle Of Inheritance And Variation Question 225
Question: A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type, the phenotypic ratio is
[Orissa JEE 2005]
Options:
A) 1 : 2 : 1
B) 3 : 1
C) 1 : 1: 1 : 1
D) 9 : 3 : 3 : 1
Show Answer
Answer:
Correct Answer: C
Solution:
A dyhybrid test cross give a 1:1:1:1 ratio indicating that two pairs of factors are segregation and assorting independently. Tt Rr × tt rr TR Tr tR tr TtRr - Tall Round Ttrr - Tall wrinkle ttRr - Dwarf Round ttrr - Dwarf wrinkle 1 : 1 : 1: 1 Phenotypic ratio
BETA
