In a fruit fly,the X-chromosome linkage map h | vedclass

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

Question

(A) The distance between two genes on a chromosome is measured in map units or centimorgans $(cM)$.One map unit corresponds to $1\%$ recombination fre

Vedclass · Accepted Answer

$\leq 50\%$

Vedclass · Answer

(A) The distance between two genes on a chromosome is measured in map units or centimorgans $(cM)$.One map unit corresponds to $1\%$ recombination frequency.However,the maximum observable recombination frequency between any two linked genes is capped at $50\%$,even if the map distance is greater than $50$ map units.This is because multiple crossovers (double or higher-order crossovers) between distant genes can result in the parental combination of alleles,effectively masking the recombination events.Since the map distance is $66$ units (which is $> 50$ units),the observed recombination frequency will be $50\%$ or less (approaching $50\%$ as the distance increases).Therefore,the correct answer is $\leq 50\%$.

In a fruit fly,the $X$-chromosome linkage map has a total length of $66$ units,with the yellow body gene $(y)$ at one end and the bobbed hair gene $(b)$ at the other end. What will be the recombination frequency between these two genes $(y$ and $b)$?

Similar Questions

There are three genes $a, b,$ and $c$. The recombination frequency between $a$ and $b$ is $20\%$,between $b$ and $c$ is $28\%$,and between $a$ and $c$ is $8\%$. What is the possible arrangement of these genes on the chromosome?

Thomas Hunt Morgan worked on which of the following organisms?

What is a linkage group?

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

Discuss why Drosophila has been used extensively for genetical studies.

Vedclass Test Series

Exam Paper Generator

Online Exam Module