Sık sorulan: What Did Thomas Hunt Morgan Discover?

What did Thomas Hunt Morgan discover about cells?

He showed that genes are linked in a series on chromosomes and are responsible for identifiable, hereditary traits. Morgan’s work played a key role in establishing the field of genetics.

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 did Thomas Hunt Morgan Discover quizlet?

Thomas Morgan, American zoologist and geneticist, famous for his experimental research with the fruit fly by which he established the chromosome theory of heredity. He showed that genes are linked in a series on chromosomes and are responsible for identifiable, hereditary traits.

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What did Thomas Hunt Morgan’s experiment conclude?

Morgan’s conclusion— that the white-eye trait followed patterns of sex chromosome inheritance —was at once very specific and very grand. A few years prior to these test crosses, Mendelian ideas of inheritance had been enthusiastically discussed by many researchers in the context of new findings about chromosomes.

What is Morgan theory?

By painstakingly examining thousands upon thousands of flies with a microscope and a magnifying glass, Morgan and his colleagues confirmed the chromosomal theory of inheritance: that genes are located on chromosomes like beads on a string, and that some genes are linked (meaning they are on the same chromosome and

What is the gender of all of the white-eyed flies?

What was 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.

Can female flies have white eyes?

All of the females and all of the males will have red eyes. All of the females will have white eyes; half of the males will have red eyes, and half of the males will 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.

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Why did Hunt Morgan use fruit flies?

Thomas Hunt Morgan, an embryologist who had turned to research in heredity, in 1907 began to extensively breed the common fruit fly, Drosophila melanogaster. He hoped to discover large-scale mutations that would represent the emergence of new species. He isolated this specimen and mated it to an ordinary red-eyed fly.

Did Thomas Hunt Morgan discover that some genes violate the principle of independent assortment?

Thomas Morgan discovered that some genes appeared to be linked; This seemed to violate the principle of independent assortment. However it was just that the linkage groups were assorted independently, but all of the genes in one group were inherited together.

What causes new combinations of linked genes?

Crossing over can cause new gene combinations to occur on a chromosome if the crossover occurs between the linked genes. When a crossover occurs between genes, chromatids with both the parental combination and chromatids with a new combination will be made.

What was Thomas Hunt Morgan’s contribution to genetics quizlet?

What was Thomas Hunt Morgan’s main contribution to science? He discovered that certain traits were linked to the X chromosome. He discovered that certain traits were linked to the Y chromosome. He created the first white-eyed female Drosophila.

Is white eyed Drosophila recessive?

The eye color gene is located on the X chromosome (one of the sex determining chromosomes of Drosophila). White eye color is recessive.

What was the most likely conclusion of Morgan’s research?

What was the most likely conclusion of Morgan’s research? The pigment in butterfly wings absorbs light from the environment. The phenotypic expression of wing shape depends on color pigmentation in butterflies. The genes regulating wing color in butterflies are influenced by environmental factors.

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What is Hemizygous condition?

Hemizygous is a condition in which only one copy of a gene or DNA sequence is present in diploid cells. Males are hemizygous for most genes on sex chromosomes, having only one X and one Y chromosome.

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