Permatogonia in the seminiferous tubules are located spermatogonia in the seminiferous tubules are located closest to the lumen of the tubule spermatogonia are not found in the seminiferous tubules closest to the outer edge of the tubule about half way between outer edge and lumen of the tubule

The correct answer is spermatogonia in the seminiferous tubules are located closest to the outer edge of the tubule. Spermatogonia is an undifferentiated male germ cell which undergoes spermatogenesis. The most immature germ cells, such as spermatogonia are located near the basement membrane of the seminiferous tubules and thus have access to factors from the interstitium.

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.