For the preparation of genetic maps,the recom | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Genetic mapping is based on the frequency of recombination between genes. For short distances,the recombination frequency is directly proportional

Vedclass · Accepted Answer

Multiple cross overs

Vedclass · Answer

(A) Genetic mapping is based on the frequency of recombination between genes. For short distances,the recombination frequency is directly proportional to the physical distance between genes,making it additive. However,over long distances,the probability of multiple crossover events (double or triple crossovers) increases. These multiple crossovers can result in the exchange of segments such that the original parental combination is restored,leading to an underestimation of the actual recombination frequency. Therefore,recombination frequencies are not additive over long distances due to multiple crossover events.

For the preparation of genetic maps,the recombination frequencies between genes are additive over short distances but not over long distances due to

Similar Questions

In a chromosome map of maize,two genes $R$ and $Y$ are located very close to each other. When $RRYY$ and $rryy$ genotypes are crossed,the $F_2$ generation analysis shows:

What is the name of the pea species used by Bateson and Punnett in their experiments?

The distance between two linked genes on a chromosome is measured in cross-over units,which is:

Which of the following statements is $NOT$ true for two genes showing $50\%$ recombination frequency?

$A$: Crossing over is the exchange of genetic material between non-homologous chromosomes.
$R$: It produces new linkages.

Vedclass Test Series

Exam Paper Generator

Online Exam Module