Select incorrect statement(s) from options given below with respect to dihybrid cross. I. Tightly li

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4.Principles of Inheritance and Variation

medium

Select the incorrect statement(s) from the options given below with respect to dihybrid cross.

$I.$ Tightly linked genes on the same chromosome show higher recombinations.

$II.$ Genes far apart on the same chromosome show very few recombinations.

$III.$ Genes loosely linked on the same chromosome show similar recombinations.

$I$ and $I I$

$I I I$ and $I I$

$I$ and $I I I$

All of these

(AIIMS-2018)

Solution

Mendel's law of independent assortment states that when the parents differ from each other in two or more pair of contrasting characters, the inheritance of one pair of factor is independent of the other. For the character to assort independently they should be located on separate non-homologous chromosomes. Genes present on the same chromosome show linkage. It means that these characters remain together and thus less number of combinations are formed. This phenomenon is called linkage and such genes are called linked genes.

Standard 12

Biology

Who used the frequency of recombination ?

medium

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 $B$

medium

Solution

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Solution

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