Answer: Morgan’s experiment: fruit flies were used in a dihybrid cross. Females with yellow bodies and white eyes were crossed with males with brown bodies and red eyes. F progeny were acquired, and they were cross-bred. The F ratio was calculated after obtaining F progeny. In a Mendelian dihybrid cross, the F ratio was found to be considerably different from 9:3:3:1. The following is an explanation for the divergence from the Mendelian ratio: The genes that are implicated are found on the X chromosome. When two genes are on the same chromosome, parental gene combinations are far more common than non-parental gene combinations. Physical relationship of genes on a chromosome is known as linkage. Non-parental gene combination (recombination).
During his studies on genes in Drosophila that were sex linked. T. H. Morgan found F2 population phenotypic ratios deviated from expected 9 : 3 : 3 : 1. Explain the conclusion he arrived at.
During his studies on genes in Drosophila that were sex linked. T. H. Morgan found F2 population phenotypic ratios deviated from expected 9 : 3 : 3 : 1. Explain the conclusion he arrived at.
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west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points above the horizontal. The horizontal component of the earth’s field is measured to be 
Specify the direction and magnitude of the earth’s field at the location.At a certain location in Africa, a compass points 
and 
carrying currents of 
and 
in the same direction are separated by a distance of 
. Estimate the force on a 
section of wire A.
wire carrying a current of 
is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 
. What is the magnetic force on the wire?
and making an angle of 
with the direction of a uniform magnetic field of 
. What is the magnitude of the field 
at a point 
from the wire?
-turns carrying current 
.
is at distance 
from the wire. Find the force acting on the electron if its velocity is directed towards the wire.