Morgan's Experiments on Crossing Over
Trending Questions
Q. Assertion : When yellow bodied, white eyed Drosophila females were hybridised with brown-bodied, red eyed males; and F1 progeny were intercrossed, F2 ratio deviated from 9:3:3:1.
Reason : When two genes in a dihybrid are on the same chromosome, the proportion of parental gene combinations in the offsprings are much higher than the non-parental type.
Reason : When two genes in a dihybrid are on the same chromosome, the proportion of parental gene combinations in the offsprings are much higher than the non-parental type.
- Assertion and reason both are false
- Both assertion and reason are true but reason is not the correct explanation of the assertion
- Both assertion and reason are true and reason is the correct explanation of the assertion
- Assertion is true but the reason is false
Q. Individual homozygous ab genes were crossed with wild type (++) in Drosophila. The F1 hybrid produced were test crossed. The progenies produced were:
++ = 900
ab = 600
+a = 115
+b = 105
Calculate the recombination frequency for a and b genes:
++ = 900
ab = 600
+a = 115
+b = 105
Calculate the recombination frequency for a and b genes:
- 10MU
- 11MU
- 12MU
- 13MU
Q. Who coined the term linkage?
- T. H. Morgan
- W. Suttom
- R. Punnett
- G. Mendel