Given below are two statements : one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$:
Mendel's law of Independent assortment does not hold good for the genes that are located closely on the same chromosome.
Reason $(R):$
Closely located genes assort independently.
In the light of the above statements, choose the correct answer from the options given below:
Both $(A)$ and $(R)$ are correct but $(R)$ is not the correct explanation of $(A)$
$(A)$ is correct but $(R)$ is not correct
$(A)$ is not correct but $(R)$ is correct
Both $(A)$ and $(R)$ are correct and $(R)$ is the correct explanation of $(A)$
$A$ : Morgan's cross III was conducted in Drosophila to locate genes on chromosome for white eye colour.
$R$ : The cross was done between red eyed hybrid female and white eyed male.
Genes $A, B$ and $C$ are linked. Genes $A$ and $B$ are more close than $A$ and $C.$ Find out the correct option for the given statements
$I.$ $A$ might be before $B$ and $C$
$II.$ $B$ might be between $A$ and $C$
$III.$ $C$ might be between $A$ and $B$
$IV.$ More crosses has occurred between $A$ and $C$ than $A$ and $B$
In Mendelism, linkage was not observed due to
When two genes are situated very close to each other in a chromosome
The distance between two genes in a chromosome is measured in cross-over units which represent