Question

In a dihybrid cross with genotypes JjQq and JJQq, what is the probability of getting an offspring with genotype JjQq?

Answer 1

There is a 1:4 chance of getting JjQq. The parent JjQq can produce four genotypes: JQ, Jq, jQ, and jq. the parent JJQq can produce two genotypes: JQ and Jq. When we do a punnett square: 
JJQQ, JJQq, JjQQ, JjQq, 
JJQq, JJqq, JjQq, and Jjqq
There are two JjQq. 
Two out of eight is one out of four. 

Answer 2

In a dihybrid cross with genotypes JjQq and JJQq, what is the probability of getting an offspring with genotype JJQQ OR Jjqq?

1/4