Hopefully the practice helps.   

1.  E

 

2.  E

 

3.  A

 

4.  C

 

5.  A

 

6.  D   Undertake a true test cross with short stalked, thin leafed barley plant  to see if any recessive traits are present

 

7.  C   6 out of the 16 have the required genotypes 

 

8.  D

 

 

9. C   Probability of having a male offspring is  0.5 or 50%, probability of passing on the X chromosome with the colour blind trait is 0.5 or 50 %....  multiply probabilities... 0.5 * 0.5 = 0.25 or 25%