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In an F2 generation only male fruit flies had white eyes What is this pattern of inheritance called?
Any trait that segregates strictly by sex would be a SEX-LINKED trait. So I suppose you could call this "sex-linked inheritance". In this case, it appears that there is a mutation in the "white" gene (which normally makes the pigment that turns the eyes red, by the way) on the X chromosome. Since only the males are displaying the phenotype, it would probably mean that the mother was heterozygous w/+ for this gene (+ indicates wild-type, which in this case translates to "red-eyed"). Furthermore, I can infer that the fathers were red-eyed +/Y (since if they were white-eyed, you would see some white-eyed female progeny), and that not all of the male progeny were white eyed (since half of them should have inherited the + copy of the gene). So your males should be approximately half w/Y and half +/Y, and the females should be half w/+ and half +/+. This type of inheritance called criss cross inheritance fom father to grandson through daughter.
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 percent of men are color blind?
It is known that the defective gene is carried on the X chromosome, so males are almost exclusively the victim, and white males make up practically the entire percentage of victims. 8 percent of all males are color blind.
Do all species have males and females?
No, not all species have males and females. For an example, whip tail lizards are an all-female species.
Can a green eyed mom and a brown eyed dad make a blue eyed baby?
I have green eyes my hubs has hazel colour, neither green or blue!, we have 3 children eldest is bright blue male second is green eyed girl and youngest is brown eyed male,(the only one who looks like mum, who has green eyes)
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.
When thomas hunt Morgan crossed his red-eye f1 generation flies with each other the f2 generation included both red and white eyed flies why were all the white-eyed flies male?
The white eyed flies that resulted from the crossing of the red-eye flies were all male as the gene involved was on the X chromosome. The X chromosome is the male chromosome.
What was the the result when Morgan mated fruit flies with the genotypes XRXr and XRy?
all the females had red eyes and half the males had red eyes
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 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 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 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 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 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 offspring would result from a cross of a homozygous red-eyed female fruit fly and a vermilion-eyed male 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.
