Which of the following statements is not true about genes that show 50...
Genetic linkage is the tendency of alleles that are close together. The recombination frequency will be 50% when two genes are located on different chromosomes that are tightly linked to each other.
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Which of the following statements is not true about genes that show 50...
Genes shows 50% recombinantion.. so the genes are loosely linked the show high recombination ... genes are tightly linked they show low recombination... so according to question option 'A' is answer...
Which of the following statements is not true about genes that show 50...
Explanation:
The correct answer is option A: The genes are tightly linked.
Recombination Frequency:
Recombination frequency refers to the likelihood of two genes on the same chromosome separating and undergoing recombination during meiosis. It is a measure of the distance between two genes on a chromosome. A recombination frequency of 50% indicates that the genes are likely to segregate independently during meiosis, meaning they are not tightly linked.
Explanation of Each Statement:
a) The genes are tightly linked:
This statement is not true. If the genes show a 50% recombination frequency, it means they are not tightly linked. Tightly linked genes would show a recombination frequency close to zero, indicating that they rarely separate during meiosis.
b) The genes show independent assortment:
This statement is true. Genes that show a 50% recombination frequency are likely to undergo independent assortment during meiosis. This means that the genes segregate independently and are not inherited together as a unit.
c) If the genes are present on the same chromosome, they undergo more than one crossover in every meiosis:
This statement is not necessarily true. The recombination frequency of 50% indicates that the genes undergo at least one crossover per meiosis. However, it does not specify the exact number of crossovers. Multiple crossovers can occur, but it is not a requirement for a 50% recombination frequency.
d) The genes may be on different chromosomes:
This statement is true. Genes that show a 50% recombination frequency can be located on different chromosomes. In this case, the genes segregate independently during meiosis due to the random alignment and separation of homologous chromosomes.
Conclusion:
Among the given options, the statement that is not true about genes that show a 50% recombination frequency is option A: The genes are tightly linked. These genes are not tightly linked and are likely to undergo independent assortment during meiosis.
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