Two genes R and Y are located very close on t | vedclass

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

Question

(B) When two genes are located very close to each other on the same chromosome,they exhibit linkage. Linkage prevents independent assortment,which is

Vedclass · Accepted Answer

$3: 1$

Vedclass · Answer

(B) When two genes are located very close to each other on the same chromosome,they exhibit linkage. Linkage prevents independent assortment,which is required for the standard Mendelian dihybrid ratio of $9: 3: 3: 1$.Because the genes $R$ and $Y$ are tightly linked,they tend to be inherited together as a single unit.In this cross,the $F_{1}$ generation $(RrYy)$ produces gametes primarily of the parental types ($RY$ and $ry$) due to the lack of crossing over.Consequently,the $F_{2}$ generation will show a phenotypic ratio similar to a monohybrid cross,which is $3: 1$.

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:

Similar Questions

Linkage in $Drosophila$ was discovered by:

Which of the following statements is false regarding linkage?

$A$ cross is made between two homozygous individuals, one with the wild type $(+, +)$ and the other with the mutant type $(a, b)$. In the $F_2$ generation (or test cross progeny), out of $1000$ individuals, $700$ are parental types. Calculate the distance between genes $a$ and $b$.

$A$ 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?

Two dominant non-allelic genes are $50$ map units apart. The linkage present is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module