What process ensures that organisms will have plenty of oxygen? a: photosynthesis  b: cellular respiration 

of the f2 females will have horns

Explanation:

Let the "presence of horn" trait be represented by "H"

and the "absence of horn" trait be represented by "h"

Given presence of horn is a dominant trait in males and recessive trait in females.

F1 Cross -

Horned female genotype - HH

Hornless male genotype - hh

HH * hh

Hh, Hh, Hh, Hh

F2 Cross

Hh * Hh

HH, Hh, Hh, hh

Only one female will have horns

of the f2 females will have horns