Genetics
What map unit(Centimorgan) is adopted in the construction of genetic maps?
If distance between genes on chromosome is more, then gene shows
$$\textbf{Correct option:}$$ $$\textbf{(A)}$$
$$\textbf{Solution:}$$
$$\bullet$$ Linkage is the phenomenon in which genes are situated on the same chromosome (linked genes) and have the tendency to inherit together during meiosis.
$$\bullet$$ Inheritance of the linked genes or the strength of linkage is dependent upon the distance between location on a chromosome.
$$\bullet$$ The more the distance between the gene on chromosomes, then gene shows weak linkage and follow crossing over to form new combination of genetic material and the less the distance between the genes the greater the linkage.
What map unit(Centimorgan) is adopted in the construction of genetic maps?
Percentage of recombination between A and B is 9%, A and C is 17% and B and C is 26%. The arrangement of genes would be
In maize, coloured endosperm (C) is dominant over colourless (c) and full endosperm (R) is dominant over shrunken (r), When a dihybrid of F$$_1$$ generation was test crossed it produced four phenotypes in the following percentage: Coloured-Full = 45%, Coloured-Shrunken = 5%, Colourless-Full = 4% Colourless-Shrunken = 46% From these data what would be the distance between the two non-allelic genes?
The linkage map of X chromosome of fruit fly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the other end. The recombination frequency between these two genes (y and b) should be
The first attempt to show linkage in plants was done in
How many linkage groups are there in nucleoid of bacteria?
In a genetic map, distance between P and Q is 12.4 map unit, Q and R is 7.6 map unit and P and R is 18.2 map unit instead of 20 map unit. This is because of
Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybrid, the F$$_2$$ segregation will show