Q. A homozygous recessive with cd genes was crossed with dominant (+ +). If their hybrid is test crossed and the following result was obtained 
+ +  -   900 
cd    -   880
+d   -   115
+c   -   105
than what will be the distance between genes c and d. 

1. 5.75 unit
2. 11 unit
3. 44 unit
4. 90 unit

Q. Two genes a and b are linked and show 30% recombination. If ++/++ individual married with ab/ab then the types and proportion of gametes in $F_1$ will be : -

1. ++ 35% : ab : 35% : +a 15% : +b 15%
2. ++15%  : ab : 15% : +a 35% : +b 35%
3. ++ 35% : ab : 15% : +a 35% : +b 15%
4. ++ 15% : ab : 35% : +a 15% : +b 35%