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Female white eyed flies are rare or absent because the gene responsible for the white eye color is recessive and located on the X chromosome. Since males only have one X chromosome, a single copy of the recessive gene results in white eyes while females would need to inherit two copies of the gene to exhibit the white eye color, making them less common.
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What if in the above cross 100 males were produced and 200 females how many total red eyed flies would there be?
If 100 out of the 300 flies are males, and all males have red eyes, then 100 red-eyed male flies would be produced. If 50% of the 200 female flies have red eyes, then 100 red-eyed female flies would also be produced. Therefore, there would be a total of 200 red-eyed flies: 100 males and 100 females.
What are the sexes and eye colors of flies with the following genotype?
White eyes are recessive sex-linked genes in fruit flies. White eyed males fruit flies have XWY, where W is for white eyes.
Explain why morgan did not find white-eyed female d melanogaster in the f2 generation when he crossed white-eyed males with red-eyed females?
Morgan did not find white-eyed female Drosophila melanogaster in the F2 generation because the gene for eye color is located on the X chromosome. Since the white eye trait is recessive and carried on the X chromosome, the F1 generation produced all red-eyed females (carrying one normal X allele from the red-eyed mother) and white-eyed males (carrying the recessive white allele inherited from the white-eyed father). Therefore, there were no white-eyed females in the F2 generation because they would need to inherit a white allele from both parents, which was not possible in this particular cross.
If a female fruit fly heterozygous for red eyes XRXr crossed with a white eyed male XrY what percent of their offspring would have white eyes?
50% of the offspring would have white eyes. This is because all females from the cross would inherit the Xr from the male, resulting in red-eyed females, while males would inherit the Xr from the female fruit fly, resulting in white-eyed males.
If you had a red eyed fruit fly but didnt know whether or not it was a carrier for white eyes how could you find out?
In fruit flies white eyes are an X-linked trait (found on the X sex chromosome). Like humans, the females have two X chromosomes and the males have one X chromosome and one Y chromosome.Determine the sex of the fly:If the fly in question is a male then it cannot be a carrier. If it is a female then it could be a carrier since white eyes are a recessive trait. (Males are said to be hemizygous since they do not have matching sex chromosomes.)Preform a cross test:To see if a female is a carrier for white eyes (heterozygous for the trait) mate her with a red-eyed male. If she is heterozygous, then all the female offspring should have red eyes (half are carriers for white eyes). Half of the male offspring should have white eyes and the other half should have red eyes. The males get one X chromosome from the mother and one Y chromosome from the father so any expression of red or white eye color comes from the mother; the presence of white-eyed male offspring proves that the mother is a carrier (heterozygous).If she is homozygous for red eyes then 100% her offspring will have red-eyes in the test cross.
What was the result when Morgan mates a white eyed male fruit with a red eyed female fruit fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What was the result when Morgan mated a white eyed fruit fly with a red eyed female fruit fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What was the result when Morgan mated a white eyed male fruit fly with a red eyed female fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What cross could Morgan have performed to make the first white eyed female fruit?
A Heterozygous female with a white eyed male.
What was the result when Morgan mated a white eyed male fruit fly with a red-eyed female fruit fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What was the result when Morgan mated a white eyed male fruit fly with red eyed female fruit fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What was the result when Morgan mated a white eyed male fruit fly with a red eyed female fruited fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What was the result when Morgan mated a white-eyed male fruit fly with a red eyed female fruit fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
What was the result when Morgan mated a white fruit fly with a red eyed female fruit fly?
When Morgan mated a white-eyed male fruit fly with a red-eyed female fruit fly, the first generation offspring all had red eyes. In the next generation, because females would have the X chromosome for white eyes, about half the offspring would have white eyes. The offspring with white eyes were all male, meaning he discovered eye color in fruit flies showed a sex-linked trait. The result of this was a generation of red eyed and white eyed individuals. If the red eyed female was heterozygous, this is possible.
Explain why Morgan did not find white-eyed female melanogaster in the f generation when he crossed white-eyed males with red-eyes females?
Red eyed (Wild) is dominant over the recessive mutated white eye trait.White eyes is a sex-linked trait. If you cross a white eyed male with a homozygous (wild) red eyed female, all the females will be red eyed carriers and the males will be red eyed also.
Are all white ferrets female?
No, not only female ferrets are white, there are many albino, or black-eyed white ferrets too.
What are the genotypes of white eyed male flies?
it would be xyx
