Explain morgan experiment related with linkage and crossing over ?
Answers
Answer:
Morgan carried out several dihybrid crosses in drosophila to study genes that were sex-linked. Example- Mendel hybridized yellow - bodied, white-eyed females to brown bodied, red-eyed males and intercrossed their F
1
progeny. He observed that the two genes did not segregate independently and the F
2
ratio deviated from the 9:3:3:1 ratio.
Morgan and his group saw that the proportion of parental gene combination was much higher than non - parental ones.
When the genes were situated on the same chromosomes. Morgan attributed this due to the physical association or linkage of two genes and coined the term linkage to describe this physical association of genes on chromosomes and the term recombination to describe the generation of non - parental gene combinations.
They also found that even when genes were grouped on the same chromosomes, some genes were very tightly linked (showed very low recombination) while others were loosely linked (showed higher recombination).
Answer:
Morgan carried out several dihybrid crosses in drosophila to study genes that were sex-linked. Example- Mendel hybridized yellow - bodied, white-eyed females to brown bodied, red-eyed males and intercrossed their F
1
progeny. He observed that the two genes did not segregate independently and the F
2
ratio deviated from the 9:3:3:1 ratio.
Morgan and his group saw that the proportion of parental gene combination was much higher than non - parental ones.
When the genes were situated on the same chromosomes. Morgan attributed this due to the physical association or linkage of two genes and coined the term linkage to describe this physical association of genes on chromosomes and the term recombination to describe the generation of non - parental gene combinations.
They also found that even when genes were grouped on the same chromosomes, some genes were very tightly linked (showed very low recombination) while others were loosely linked (showed higher recombination).
Explanation:
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