There are two different alleles for flower color, p and p. the image shows a white sweet pea that is labeled with its two alleles for petal color.

a white sweet pea is labeled p p.

what can you surmise from the labeled image?
a. the genotype is heterozygous.
b. white petal color is a recessive trait.
c. white petal color is a dominant trait.
d. the phenotype is heterozygous.

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait. 

Gases enter the atmosphere and trap the sun's heat warning the earth.