A certain type of grass has a diploid chromosome number of 8. A similar species of grass has a diploid chromosome number of 10. Interspecific hybridisation between the two species results in sterile hybrids that can, nonetheles, reproduce vegetatively. The diploid chromosome number of these hybrids would be

Options

A. 9
B. 16
C. 18
D. 20

Answer

A

Explanation

The cross between these species can be represented as follows:
`{:("Grass A",,"Grass B",),((2n=8),,(2n=10),),(" "darr,," "darr,),("Gametes",,"Gametes",),((n-4),,(n=5),),(," "xx,,),(," "darr,,),(,"Sterile hybrid",,),(," "(2n=9),,):}`