Who studied fruit flies?
Thomas Hunt Morgan
What was Thomas Hunt Morgan known for?
Thomas Hunt Morgan (September 25, 1866 – December 4, 1945) was an American evolutionary biologist, geneticist, embryologist, and science author who won the Nobel Prize in Physiology or Medicine in 1933 for discoveries elucidating the role that the chromosome plays in heredity. Morgan received his Ph.
Why did Thomas Hunt Morgan use fruit flies in his studies?
Morgan decided to use fruit flies to study how physical traits (for example, eye color) were transmitted from parents to offspring, and he was able to elegantly show that genes are stored in chromosomes and form the basis of heredity.
What was Thomas Hunt Morgan’s experiment?
In 1910, Thomas Hunt Morgan performed an experiment at Columbia University, in New York City, New York, that helped identify the role chromosomes play in heredity. Through more breeding analysis, Morgan found that the genetic factor controlling eye color in the flies was on the same chromosome that determined sex.
What is the gender of all of the white eyed flies?
Although the first generation of 1,237 offspring was all red-eyed but for three, white-eyed flies appeared in larger numbers in the second generation. Surprisingly, all white-eyed flies were male.
Why do heterozygous females have red eyes?
Since the female parent is homozygous, whichever allele the males get, they will receive a red-eye allele. Females are red-eyed because the presence of the recessive copy is masked. Males are red-eyed because they only have one copy of the gene, and that copy is for the red allele.
Why do some fruit flies have white eyes?
They have a defect in their “white” gene, which normally produces the red pigments in the eye. In these flies, the white gene only works partially, producing fewer red pigments than it should. These flies have white eyes.
Why is the White eyed characteristic more common in males?
Because the white-eye allele is recessive, a female will have white eyes only if she has the white-eye allele on both her X chromosomes. However, in males, a single copy of the white-eye allele on the lone X chromosome will lead to white eyes because no other allele is present.
What is the chance that the offspring will have white eyes?
What is the chance that there will be an offspring with white eyes? 50% or 244 Page 2 6. Hemophilia is a disease caused by a gene found on the X chromosome. Therefore, it is referred to as a sex-linked disease.
Why are the fruit flies not going into the vinegar?
Fruit flies are attracted to the carbon dioxide that’s emitted from any type of fermenting organic material, like an overly ripe fruit. The fruit flies will be able to get in, but they’ll have a hard time escaping, says Hedges. Eventually, you’ll kill them when they fall into the vinegar, conk out, and drown, he says.
How do you catch fruit flies without apple cider vinegar?
If you don’t have any vinegar on hand, you can also trap fruit flies by placing a piece of overripe fruit in an open plastic bag. Just wait for the fruit flies to congregate on the fruit. Then, carefully seal the bag, trapping them inside.
What is the best fruit fly trap?
Use apple cider vinegar. Fill a bowl or glass with apple cider vinegar, cover with plastic wrap, seal the edges with a rubber band, and poke tiny holes in the top. The vinegar will attract the fruit flies, and once they’re inside, they won’t be able to escape the plastic wrap barrier.