If shaded symbols indicate having a dominant trait, what must be the genotype of the father in this pedigree chart?

Heterozygous

Explanation:

The offspring both carry recessive genes. The recessive gene will show up more often if one of the parents are heterozygous of the gene along with the other having recessive.

If the father was had both of the dominant traits, the offspring would inherit his trait instead.

b. heterotroph

explanation:

b. the carbon cycle ensures living things have a source of hydrogen