which of thomas hunt morgans hypotheses was valid based on these results?\nwhite eyes are lethal in female…

which of thomas hunt morgans hypotheses was valid based on these results?\nwhite eyes are lethal in female drosophila.\nwhite eyes are lethal in male drosophila.\nfemale drosophila with white eyes are homozygous recessive.\nwhite eyes are the dominant trait in female drosophila.

which of thomas hunt morgans hypotheses was valid based on these results?\nwhite eyes are lethal in female drosophila.\nwhite eyes are lethal in male drosophila.\nfemale drosophila with white eyes are homozygous recessive.\nwhite eyes are the dominant trait in female drosophila.

Answer

Brief Explanations:

Thomas Hunt Morgan studied eye - color inheritance in Drosophila. The cross shows that female flies can be carriers ($X^RX^r$) and males with white eyes ($X^rY$) are present. White - eyed females would be $X^rX^r$. Since white - eyed females are not present in the cross results shown, it implies that female Drosophila with white eyes are homozygous recessive. White eyes are not lethal in males as $X^rY$ males are present. There is no evidence that white eyes are lethal in females or that white eyes are dominant in females.

Answer:

Female Drosophila with white eyes are homozygous recessive.