Question

Distance between the genes and percentage of recombination show
A.A direct relationship
B.An inverse relationship
C.A parallel relationship
D.No relationship

Answer 1

Hint: Linkage is known as the inheritance of two genes together when they are closely located in a chromosome, Recombination is the process where the DNA sequence is recombined to form a new combination of genes that leads to diversity in genes.

Complete answer:
Linkage and recombination together form an important phenomenon that explains the inheritance of genes. Linked genes are of two types, Tightly linked and loosely linked.
The tightly linked genes show very less recombination as they tend to inherit together and tightly linked genes produce more number of parental type offsprings, whereas the loosely linked genes can easily cross over leading to recombination that is mixing of genetic material which leads to the production of more number of recombinant type organism.
Linkage does not follow Mendel's law of independent assortment according to which the genes located at the same chromosome must segregate and inherit independently. Linkage and recombination were explained by Morgan through the chromosomal theory of inheritance.
Option B: More the linkage less will be the recombination, and less the linkage more will be the recombination, This statement suggests that linkage and recombination are inversely proportional to each other. Therefore, this is the correct option. All the other options are irrelevant.

Hence, the correct answer is option (B)

Note: Linked genes show two types of configuration, coupling configuration where the dominant alleles are placed together in one chromosome or recessive alleles are placed together but in repulsion configuration, one chromosome contains one dominant along with one recessive allele.