Question

in humans having more than five fingers or toes is dominant over having exactly five fingers or toes which of the following situations would most likely result in exactly half of a couple offspring having six digits and half of them having five
1:both parents are homozygous for the recessive trait
2:both parents are heterozygous
3:one parent is heterzygous while the other is homozygous for the recessive trait
4: one parent is homozygous for the recessive trait while the other is homozygous for the dominant trait.