Give scientific reasons: Linkage and crossing | vedclass

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Question

(A) Linkage and crossing over are considered alternatives because they have opposing effects on the inheritance of genes located on the same chromosom

Vedclass · Accepted Answer

Linkage keeps genes together,while crossing over separates them.

Vedclass · Answer

(A) Linkage and crossing over are considered alternatives because they have opposing effects on the inheritance of genes located on the same chromosome.Linkage is the phenomenon where genes located close together on the same chromosome tend to be inherited together,thereby reducing the frequency of recombination.Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis,which leads to the separation of linked genes and increases genetic recombination.Therefore,while linkage promotes the parental combination of alleles,crossing over promotes the formation of new combinations (recombinants),making them functional alternatives in determining the inheritance pattern of linked genes.

Give scientific reasons: Linkage and crossing over of genes are alternatives of each other.

Similar Questions

There are three genes $a, b, c$. The percentage of crossing over between $a$ and $b$ is $20\%$,between $b$ and $c$ is $28\%$,and between $a$ and $c$ is $8\%$. What is the sequence of genes on the chromosome?

Mendel was successful in discovering the principles of inheritance because:

Two genes $R$ and $Y$ are located very close on the chromosomal linkage map of maize plant. When $RRYY$ and $rryy$ genotypes are hybridized,then $F_{2}$-segregation will show:

Which of the following is an exception to Mendel's laws?

$A$ test cross of an $F_1$ fly $+a/+b$ produces the following offspring:
$++/ab = 9$
$ab/ab = 9$
$+b/ab = 41$
$a+/ab = 41$
What is the distance between the linked genes?

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