Select correct statement from ones given below with respect to dihybrid cross.

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4.Principles of Inheritance and Variation

medium

Select the correct statement from the ones given below with respect to dihybrid cross.

Tightly linked genes on the same chromosomes show higher recombinations.

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

Genes loosely linked on the same chromosome show similar recombinations.

Tightlylinked genes on thesame chromosome show very few recombinations.

(AIPMT-2010)

Solution

(d): Linkage is the phenomenon ofcertain genes staying together during inheritance through generations without any change or separation due to their being present on the same chromosome. Linked genes occur in the same chromosome. Strength of the linkage between two genes is inversely proportional to the distance between the two $i.e.$, two linked genes show higher frequency of crossing over (recombination) if the distance between them is higher and lower frequency if the distance is small.

Standard 12

Biology

Crossing over is

medium

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:

medium

(NEET-2022)

Linkage decreases the frequency of

medium

Assertion : In case of incomplete linkage, linked gene show new combination along with parental combination.

Reason : In case of incomplete linkage, linked genes are separated by crossing over.

hard

(AIIMS-2010)

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by

medium

(NEET-2019)

Select the correct statement from the ones given below with respect to dihybrid cross.

Solution

Similar Questions

Crossing over is

Linkage decreases the frequency of

Assertion : In case of incomplete linkage, linked gene show new combination along with parental combination. Reason : In case of incomplete linkage, linked genes are separated by crossing over.

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by

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Assertion : In case of incomplete linkage, linked gene show new combination along with parental combination.

Reason : In case of incomplete linkage, linked genes are separated by crossing over.