First slide

Inheritance of Two Genes

Question

Which of the following statements is not true of two genes that show 50% recombination frequency?

Moderate

A

The gene show independent assortment.
B

If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis
C

The genes may be on different chromosomes
D

The genes are tightly linked.

Solution

If the genes are showing 50% recombination, there are two possibilities:
1) Both the genes are present on two non-homologous chromosomes and therefore showing independent assortment.
2) Both the genes are present on the same pair of homologous chromosomes but far apart where possibility of linkage is almost zero.
Both maximum crossing over and independent assortment give rise to 50% recombinant gametes

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