Where on earth would carbon absorption in plants peak during january and february

Explanation:

The genotypes in the offspring of the p-generation, i.e. F1, are

Hh (hetero-zygous) short hair

hh (homo-zygous) long hair

each with 50%

However, when Hh crosses with hh, the proportion of the F1 should be 50% each of long and short hair.  The diagram shown does not seem to be consistent with realigy.