Table of Contents
Did Morgan study linked genes?
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 …
How did Morgan explain his finding about gene linkage?
How did Morgan explain his finding? Linked genes were inherited together because they were close to each other on the same chromosome. The farther apart two genes were on a chromosome, the more likely it would be that crossing-over would occur between them.
How linkage is an exception to Mendelian inheritance?
Linkage is an exception to Mendel’s law of independent assortment. Linkage is an exception to this law as two genes are situated on the same chromosome, however, this is usually diminished when there is a crossing over of chromosomes. Some of the allele combinations are not independently inherited from each other.
How did Morgan demonstrate that a specific gene was associated with a specific chromosome?
Morgan began breeding the white-eyed mutant fly and found that in one generation of flies, the trait was only present in males. 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 Morgan conclude from his research?
4, 1945, Pasadena, Calif.), American zoologist and geneticist, famous for his experimental research with the fruit fly (Drosophila) 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.
What is Morgan experimental evidence about chromosome?
Morgan discovered a mutation that affected fly eye color. He observed that the mutation was inherited differently by male and female flies. Based on the inheritance pattern, Morgan concluded that the eye color gene must be located on the X chromosome.
Who clearly proved and define linkage?
However, it was Morgan (1910) who clearly proved and defined linkage on the basis of his breeding experiments in fruitfly Drosophila melanogaster.
Why linkage is an exception to Mendelian principle of independent assortment?
Gregor Mendel’s law of independent assortment states that when genes are inherited, they are inherited independent of each other. Linked genes are exceptions to the law of independent assortment because two genes are located on the same chromosome, but this is generally mitigated when chromosomes cross over.