8 / 19 Assuming no gene linkage, in a dihybrid cross of AABB x aabb with AaBb F 1 heterozygotes, what is the ratio of the F 1 gametes ( AB , aB , Ab , ab ) that will give rise to the F 2 offspring?
A1:1:1:1
B1:3:3:1
C1:2:2:1
D4:3:2:1
Questions & Answers
Explain the following terms .
(1) Abiotic factors in an ecosystem
Abiotic factors are non living components of ecosystem.These include physical and chemical elements like temperature,light,water,soil,air quality and oxygen etc