CBSE Class 12-science Answered
During his
studies on genes in Drosophila which were sex-linked, T. H. Morgan found that the population phenotypic ratios deviated from the expected 9:3:3:1 ratio. Explain the
conclusion he arrived at.
Asked by Topperlearning User | 16 Jun, 2014, 03:46: PM
Expert Answer
(i) T. H. Morgan observed that when the two genes in a dihybrid cross are located on the same chromosome, the proportion of parental gene combinations in the progeny was much higher than the non-parental or recombination of genes.
(ii) Morgan and his colleagues found that when genes were grouped on the same chromosome, some genes are tightly linked and show less recombination.
(iii) When the genes are loosely linked, they show higher recombination.
Answered by | 16 Jun, 2014, 05:46: PM
Concept Videos
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Linkage
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Crossing Over
This video talks about crossing over in chromosomes -
Sex Determination in animals
This video talks about sex determination in different organsism -
Chromosomal Theory of Inheritance
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