(a). Write the scientific name of the organism Thomas Hunt Morgan and

1.	(a). Write the scientific name of the organism Thomas Hunt Morgan and his colleagues worked with for their experiments. Explain the correlation between linkage and recombination with respect to genes as studied by them. (b). How did Sturtevant explain gene mapping while working with Morgan?
Answer» (a). Drosophila melanogaster They observed that two genes (located closely on a chromosome) did not segregate independently of each other (F2 ratio deviated significantly from 9 : 3 : 3 : 1) Tightly linked genes tend to show fewer (lesser) recombinant frequency of parental traits / show higher (more) frequency of parental type Loosely linked genes show higher percentage (more) of recombinant frequency of parental traits / lower frequency percentage of parental type Genes present on same chromosome are said to be linked and the recombinant frequency depends on their relative distance on the chromosome (b). He used the frequency of recombination between gene pairs on the same chromosome, as a measure of the distance between genes and mapped their position on the chromosome.

(a). Write the scientific name of the organism Thomas Hunt Morgan and his colleagues worked with for their experiments. Explain the correlation between linkage and recombination with respect to genes as studied by them. (b). How did Sturtevant explain gene mapping while working with Morgan?

Answer»

(a). Drosophila melanogaster They observed that two genes (located closely on a chromosome) did not segregate independently of each other (F2 ratio deviated significantly from 9 : 3 : 3 : 1) Tightly linked genes tend to show fewer (lesser) recombinant frequency of parental traits / show higher (more) frequency of parental type Loosely linked genes show higher percentage (more) of recombinant frequency of parental traits / lower frequency percentage of parental type Genes present on same chromosome are said to be linked and the recombinant frequency depends on their relative distance on the chromosome

(b). He used the frequency of recombination between gene pairs on the same chromosome, as a measure of the distance between genes and mapped their position on the chromosome.

(a). Write the scientific name of the organism Thomas Hunt Morgan and his colleagues worked with for their experiments. Explain the correlation between linkage and recombination with respect to genes as studied by them. (b). How did Sturtevant explain gene mapping while working with Morgan?

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