Which of the following statement is not true of two genes that show 50 percentage recombination frequency? (A) the gene show independent assortment (B) the gene's are present on the same chromosome,they undergo more than one crossover in every meiosis (C) the genes may be on different chromosome (D) the genes are tightly linked?

Question

Answer

Option D is correct for above question bcoz if genes were tightly linked, there would be least chance of crossing over but in our question there is 50% chance of recombination which can't happen if genes are tightly linked

Answer

The nearer two genes are on a chromosome, the lower the chance of recombination between them, and the more likely they are to be inherited together. .The frequency of a single chromosomal crossover between 2 genes at the stage of meiosis is known as recombination frequency. In meiosis, crossover occurs at random positions; thus, the closely located genes show less chances of crossover.lesser the distance between 2 genes, the lesser the chances of recombination of them

Answer

D

Answer

Thanks for the both..

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Thank but how??

Answer

Statement Not True:

(D) the genes are tightly linked

Independent Assortment: Two genes that show 50% recombination frequency are likely to be located on different chromosomes. This means that they are inherited independently of each other during meiosis, leading to independent assortment.
Multiple Crossovers: When genes are on the same chromosome and show a 50% recombination frequency, it indicates that they undergo more than one crossover event per meiosis. This results in the exchange of genetic material between the two genes.
Possibility of Being on Different Chromosomes: The 50% recombination frequency suggests that the two genes are likely located on different chromosomes, as genes on the same chromosome would be expected to show lower recombination frequencies if they are tightly linked.
Not Tightly Linked: If two genes show 50% recombination frequency, it indicates that they are not tightly linked on the same chromosome. Tightly linked genes would show lower recombination frequencies, closer to 0%, as they would be inherited together more often.

In conclusion, the statement that the genes are tightly linked is not true for two genes that show a 50% recombination frequency. Instead, this frequency suggests that the genes are likely located on different chromosomes or are on the same chromosome but undergo multiple crossovers during meiosis, leading to independent assortment.

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Which of folowing is nottrue of two genes that show 50% recombinant frequency. 1.genes may be on differentchromosomes 2.genes are tightly linkef.3.genes show independent assortement.4.if genes r present on same chromosome they undergo morethan one crossingover in every meiosis.?

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